change Symphony version in the .htaccess template
converted to spaces
Merge pull request #2080 from DeuxHuitHuit/htaccess

Htaccess version
added validation in order to spot errors sooner: element can not be child of itself
added @since Symphony 2.4.1 on validateChild
Merge pull request #2081 from DeuxHuitHuit/XMLElement-this

XMLElement: prevent any element from being a child of itself.
Add CACHE constant to Provider interface
Add wildcard to support Provider's DS/Events with custom URL parameters
Merge branch 'integration' of github.com:symphonycms/symphony-2 into integration