Handle several RDBMS

Change text_field to :login from :email in line with 9d92433a to allow login as admin or non-ldap user when ldap is enabled
Also change haml style in line with that commit

Default settings for project features

Fix typo in Project API documentation for deleting hooks

Improve performance of network graph

Conflicts:
	config/gitlab.yml.example
	config/initializers/1_settings.rb

Typo fix in  app/views/commit/huge_commit.html.haml 

Fix issue when switching branch when BLOB is shown

Fix blob-switching for AJAX-Requests

Reorder

Move init.d and nginx default recipes in core library to save efforts trying keep sync between gitlab-recipes and gitlabhq

There is no _commit_box.html.haml in app/views/commits it's in app/views/commit

Use secure Gravatar url when https is set to true in the configuration