Add git revert --no-edit support.
Merge branch 'revert-support' of git://github.com/fasttracktool-dev/ruby-git into fasttracktool-dev-revert-support

Conflicts:
	lib/git/base.rb
	lib/git/lib.rb
	tests/units/test_index_ops.rb
Merge branch 'revert-support' of git://github.com/fasttracktool-dev/ruby-git into fasttracktool-dev-revert-support

Conflicts:
	lib/git/base.rb
	lib/git/lib.rb
	tests/units/test_index_ops.rb