Allow error messages with non-ascii characters to be handled correctly

Also, add a test for this behavior.
Convert many byte strings to unicode; change string formatting
Fix some line lengths to make pylint happy
Fix formatting of docstrings; add more docstrings
Fix typo in output message of rakefile
Initial testing for parallelization
move override of MODULESTORE settings into ModuleStore test case class
Added the beginnings of self cleanup
Contentstore singleton is now cleared during teardown
Moved port range to rake file
PR fixes
Update discussion documentation
Cleaned up import and comment
Fixed pylint/pep8 violations
Consolidated imports
Pylint complains if you use string, even if you use it for what its still meant to be used for.
Remove keybinding for work in progress (WIP).

STUD-329
Change wildcard imports into specific imports
Tweaks to our pylintrc rules.
Fix all W0602, global used but no assignment done.