Added the beginnings of build documentation.
Add further build instructions.
moved mkdir() to plugin utils.
pep8.
Fix unittest break due to trying to authenticate a database with an empty username & password
Clean up comments
Merge pull request #1179 from pulp/jortel-mkdir

moved mkdir() to plugin utils.
Merge pull request #1186 from pulp/barnabycourt-unittest

Fix unittest break due to trying to authenticate a database with an empt...
Merge branch '2.5-dev'
Fixes from PR review.
Merge branch 'build_docs'