warn to use 4 spaces instead of tabs in CONTRIBUTING.md
remove some items done in wishlist
warn about no creation of 'master' branch in 'init' doc
doc for setting custom workspace
Add use cases page and a use case to migrate from TFSVC to git
usecases working with branches and without
use case on managing shelvesets
more on managing branches....
Merge pull request #446 from pmiossec/doc

Doc