Move examples to its own git repository

Examples do not follow a strict release cycle.

Examples can still be updated even though the dependency has been released.

e.g. the branch "modeshape-examples-2.5" (which I think should be "master" branch) should depend on the latest ModeShape 2.5.x release available.

the branch "modeshape-examples-snapshot" should depend on the latest ModeShape snapshot. However I'm not sure if people actually need this, but this might be useful for ModeShape developers.

Arquillian has its own examples git repo here: https://github.com/arquillian/arquillian-examples
Which is a good thing.

Git projects usually are structured differently than SVN, they are one "project" per repo instead of all projects lumped in one place. Arquillian is a good example of this. But this is another issue, I think just the examples repo is more priority for now.