- Rename some upgrader scripts
- Add upgrader script to check for table existence
- Rename some upgrade constraints
- Add upgrade constraint (table existence)
- Clean up some files

  This commits break testERP5Catalog

This reverts commit 61a67550.

Conflicts:
	product/ERP5/bootstrap/erp5_property_sheets/bt/revision

Conflicts:
	bt5/erp5_base/bt/revision

Thanks to this Computer Partitions can be in same category as Computers they
are contained in.

Conflicts:
	bt5/erp5_base/bt/revision

Conflicts:
	bt5/erp5_base/bt/revision

Really useful when same field declared in one page

erp5_short_message: Remove proxy role in ShortMessage_init to not allow anonymous users to create/edit Short Messages

* to quickly setup catalog_full_text table, you can use the following SQL.

  REPLACE INTO catalog_full_text SELECT uid, title, description FROM catalog;

* non fulltext queries like '=abc', '>abc', '%abc%' are supported.

* now erp5_full_text_mroonga_catalog is used for unit tests thus I recommend using it instead of erp5_full_text_myisam_catalog.

* to migrate existing MyISAM full_text table into Mroonga, you can use the following SQL.

  ALTER TABLE full_text DROP KEY SearchableText,
    ENGINE = mroonga,
    ADD FULLTEXT KEY SearchableText (`SearchableText`) COMMENT 'parser "TokenBigramSplitSymbolAlpha"';

* fulltext search score is no longer provided as (column_name) but now provided as (column_name)__score__.

* (category)_title, like source_title, related keys are automatically generated. (category)_description keys as well.