Replace any system calls in lib that don't use git with calls to FileUtils
Replace a system call in the spec helper
Added options for exec command and a new exec_all command.
Merge pull request #105 from JCook21/ExecCommands

Further work on exec command
Added documentation for the exec and exec_all commands.
Merge pull request #101 from nicolasmccurdy/use-libraries

Use stdlib methods to replace most non-git shell calls. Looks good.
Add a Gitter badge to the readme
Add the grit gem
Add a new RepoFinder module, along with new tests for it
Start using grit for commands that don't need to show git output