Link to Google Code project page instead
Clarify requirement scope.
Rearrange based on importance
Make lib dir optional

Allows use of GitTail without fetching the submodules.

Useful if none of the submodules are needed on a given system
or if the user wants to use versions installed system-wide
or with virtualenv.
Ignore non-directories in lib path
Add timestamp to console message
Refactor message generation

- Make it easier to plug in templates
- Prefer terminology used by dependencies