Update to WMF 5 Preview May 2014.

* Per the README from MSFT, WMF5 requires Powershell 2.
* Also, correct Rubocop violations.
Using attributes for bits_4
Update changelog for 3.0.5 release
Added (possibly-broken) test harness
Correct URL for current WMF preview
Rubocop module was renamed to RuboCop in 0.23.0
Turn off FC017, not FC005
v3.0.6 Release
Release 3.0.7 - one more time with feeling
Truly record the fix