Allow ability to specify a package name.  Useful for CentOS where git defaults to 1.7.x and the git18 package is available to install 1.8.x
Merge pull request #26 from Spechal/master

Allow ability to specify a package name.
Prepare a 0.2.0 release.
Merge pull request #29 from apenney/020-release

Prepare a 0.2.0 release.