Rename helpers file
Make data_root to be an absolute path
Factor out to a function the CVS handling
Favor use of git protocol

According to http://git-scm.com/book/en/Git-on-the-Server-The-Protocols
is the faster one.
Include Mozilla Gaia translations
Random cleanups
Cleanup: Create directories with mkdir -p
Cleanup: Enter once in the directory
Refactor Mandriva script to use shared svn function
Use quiet flag for cvs
Also use quiet flag for svn
No need to redirect output if we use -q flags
Use pushd and popd in svn function to align with the other functions

It is not necessary, but regular code will ease further refactoring.