Do not display error in browser not implementing WebSQL.
WebSQLStorage will raise an error is used in such browsers.

JSON.stringify is not stable by design and can not be used to generate the hash.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify

This commit adds a stable version of JSON.stringify, available at jIO.util.stringify.
Relying on the nearly same string representation will simplify compatibility.

Tests were failing because some Firefox versions cannot
parse a specific date-string. So the Date constructor
that receives only integers was used. But there is one
details: this contructor uses months from 0 to 11, so if,
for example, we want to have a date in January, we send 0
as month and not 1.

Fix ERP5Storage to reduce conflicts during synchronisation.
ERP5Storage.get return a new parent_relative_url property which will lead to changes from ReplicateStorage point of view.

Fix QueryStorage/MemoryStorage bugs.

Copy all documents/attachments set in the storage, to prevent unwanting external modifications

This ensure that document created during synchro contains the same properties on local and remote storage.

portal_type attribute is not set anymore on getAttachment('person_module', 'view') json.
This remove duplicated code.

All time objects now are handled as local time, doesn’t the test runner
timezone. Also all queries tests that once used the native Date are now
using JIODate.

Webkit has issues when trying to load data-uri based images with
XMLHTTPRequest this is changed for the sake of compatibility with all
browsers.

Contains an ERPStorage fix.

Put action is not send anymore by ERP5 if document is not editable.
See: nexedi/erp5@c71cfd66

Include support for ERP5 FileField

Include query parser fixes.

http://zaach.github.io/jison/about/

Jison is maintained and used by other JS projects (like Coffeescript)

Include WebSQLStorage.
New authentication for DavStorage.

This option is false by default to prevent any Cross Origin issue unsupported by most webdav servers

Squashed commit of the following:

commit 1591f5e199f91abca92ba3bb46ee3aa356c976fc
Author: Romain Courteaud <romain@nexedi.com>
Date:   Fri Dec 18 15:56:42 2015 +0100

    DavStorage: rename _withcredentials parameter to with_credentials

    Add tests.
    Update documentation.

commit 33b2113ca5ac42b015264f12776326d848320022
Author: Isabelle Vallet <isabelle.vallet@nexedi.com>
Date:   Wed Dec 16 06:22:08 2015 -0800

    DAV storage: add option for cross-origin cookie propagation.

Squashed commit of the following:

commit 3ddc5e522969d8e5270dc408eec71fc0847c40ce
Author: Lucas Parsy <lucas.parsy@nexedi.com>
Date:   Thu Dec 17 16:44:19 2015 +0100

    corrected misspellings and ambiguous examples in manage_document file.
    deleted gid and revision storage documentation.

commit 85d30999afdd227c8d4085fcd2df329f0d95333e
Author: Lucas Parsy <lucas.parsy@nexedi.com>
Date:   Tue Dec 15 15:13:23 2015 +0100

    updated documentation
    renamed "revision_storage.rst" "replicate_storage.rst"
    you need to "compile" the files (go in doc/ directory and type "make")
    to have the html files.

Squashed commit of the following:

commit 6fc5b5bd01796efd32905f7d62516ddbba7acef7
Author: Romain Courteaud <romain@nexedi.com>
Date:   Thu Dec 10 18:32:14 2015 +0100

    Cleanup rebase

commit 62e5e10d84caf9659dd32bfc71f03b7622aea5e2
Author: Lucas Parsy <lucas.parsy@nexedi.com>
Date:   Thu Dec 10 17:31:49 2015 +0100

    added scenario for webSQL storage

commit 3aae5518b87005a236dec2b3542c0cdcc9907029
Author: Lucas Parsy <lucas.parsy@nexedi.com>
Date:   Thu Dec 10 15:44:40 2015 +0100

    removed useless table in websqlstorage
    added indexes to increase queries speed.

commit 4072ea01a4bc7bd46ca611b7bf9dbf63d591c049
Author: Romain Courteaud <romain@nexedi.com>
Date:   Wed Dec 9 17:34:35 2015 +0100

    WebSQLStorage: do not sort results

commit 6d30b4bf011e6e8389a70ff185c9a739a7a2b196
Author: Romain Courteaud <romain@nexedi.com>
Date:   Wed Dec 9 17:25:23 2015 +0100

    WebSQLStorage: naming convention

commit 0928b105f756301eaaaf7ccae08c54c798a438fe
Author: Lucas Parsy <lucas.parsy@nexedi.com>
Date:   Wed Dec 9 11:09:01 2015 +0100

    various fixes in websqlstorage.

    added error callback on db.transaction.
    refactored sqlExec to do multiples queries in one transaction.
    refactored database initialisation.
    removed index functionality from websql.
    modified tests to follow above changes.

commit 00bd1cd2c5b19583bab0a74f7bcc86a59c97d3fb
Author: Lucas Parsy <lucas.parsy@nexedi.com>
Date:   Wed Dec 2 13:24:41 2015 +0100

    corrected bugs in websqlstorage breaking rsvp queues.
    added sinon spy tests in websqlstorage test file.

commit ccb2702df2fec1bd6eddca3cc2a8bbc9c8734749
Author: Lucas Parsy <lucas.parsy@nexedi.com>
Date:   Mon Nov 30 12:15:43 2015 +0100

    deleted test modifications done to Gruntfile, Makefile and tests.html files.

commit 344720f32f4ba7e9168cf68f43400bc56ea8c988
Author: Lucas Parsy <lucas.parsy@nexedi.com>
Date:   Mon Nov 30 11:41:04 2015 +0100

    added allDocs method in websqlStorage
    added tests for Websqlstorage and refactored some tests.

commit 2211a28605aedfb0683da5b3ea08f1cba47dc869
Author: Lucas Parsy <lucas.parsy@nexedi.com>
Date:   Mon Nov 23 16:29:36 2015 +0100

    first commit websql
    websql storage operational, lacks allDocs and query support
    half of the tests written.
    error handling to improve.