Merge pull request #1 from codingforinterviews/master

Updates
Merge pull request #2 from codingforinterviews/master

Fixing case on -C
Git -C issue should be fixed. Replaced -C with --git-dir and --work-tree
Merge pull request #3 from Crackerz/master

https://github.com/Crackerz/cfi/commit/50311bb10d13a5fdb5fc9e9f95f5741d5fff8676