Cleanup .gitignore
Make generating standalone less obnoxious

* .gitignore the binary
* add an explicit rake task
Spill GitTracker::Version at top of standalone
Fix the FileList used to build standalone

It's a list of patterns, dammit.
Add a rake task to install the standalone

This will be used by homebrew.
Use explicitly named subject.
Add a test-command for homebrew

This way homebrew can "test" to see if the script was properly
installed via the Formula.
Move Rubygem-related tasks under gem namespace
Add docs for Homebrew installation
Add homebrew to changelog
Bump to v1.4.1