Yoda Condition checks

Introduce a sniff for checking Yoda style Conditional checks
Improvement for greater/less than symbols
Improved Regex expressions and better unit tests
Improvement to Unit Tests

Unit Tests are now better documented and as the Sniff reports errors we
validate for them rather than warnings.
Improvements to Regex and layout

Merge 3 Regex checks into one and improved file layout
Missed Unit Test Error
Merge pull request #221 from mattyrob/master

Introduce Yoda Conditions Sniff and Unit Tests