grit -> gitlab-grit
Include grit_ext inside gitlab-grit
rename grit.gemspec to gitlab-grit.gemspec
Merge pull request #20 from gitlabhq/gitlab-grit-gem

WIP: gitlab-grit gem to replace grit fork
Handle filenames with spaces
Merge pull request #21 from vzctl/filenames_with_spaces

Handle filenames with spaces
Adds "quick_diff" feature to Commit class.

Returns "unbaked" Diff instances with only the a_/b_path, new_file, and
deleted_file props set.