Fix issue with common "{{ }}" template syntax in a CSS rule

[Lixivial]

This adjusts the regex to meet the test case outlined in issue #29

Basically it expands the syntax parsing to ignore }} in both the @media and non @media query cases, while also ensuring that all further text in the capture group is maintained.

In addition, I added 6 or 7 more unit tests and cleaned up a couple of unit tests to add other potential regression checks.