Added omit param to ignore 'tests' folder.

This assumes the tests are not inside the package
Changes from SourceTree and some new alias commands.

SourceTree added diff and merge info to gitconfig.
Changed email in hgrc to amplify-nation.com and added log --follow.
Changed alias for ls into lsl and lst for when I want the standard ls
  and also a list not sorted by time.
Added pylinks alias to list all egg-link files in pyenv versions.  This
  shows which environments have links to source code and where that code
  lives.