Merge pull request #1 from BenoitDuffez/master

Fix bug when XML from file import already contains CDATA tags
Removed old code from legacy version
Added information about embedding HTML in Strings
Added two options for HTML escaping to XML export
Added possibility to delete phrases
Updated .htaccess for phrase deletion
Updated README
Fixed URL rewriting bug for short project URLs
Added review feature: Approve all by contributor
Placeholder matching: Fixed sorting bug