[Owncloud] refactoring branch merged into master

[Robin Appelman]

Hi all,

I've just finished merging the refactoring branch, that holded the 2.0 
development code into git master.

That means that from now on the development for 2.0 will happen in master and 
everyone installing from git will get 2.0

If you were already using 2.0 from the refactoring branch, git pull and 
checkout the master branch to keep up with the development of 2.0

If you are upgrading from 1.x to 2.0 you will need to redo the installation 
proces since 2.0 breaks database and configuration compatibility with 1.x
Remove config/config.php and the database if you're using mysql to re-trigger 
the first run dialog.

 - Robin Appelman