Add support multi zeo servers.
Add zrs template in file storage.
Fix the variable for replicate-from, repliacte to and keep alive delay.
Add read only and read only fallback config.
Use zeo_part and check if zeo_part is there.
Make sure zeo part is in buildout.
Add override values for replicate from, replicate to and keep alive delay.
Merge branch 'github/master' into multi-server-address
Merge branch 'multi-server-address' of github.com:pretaweb/collective.recipe.filestorage into multi-server-address

Conflicts:
	collective/recipe/filestorage/__init__.py