New cop `CaseEquality` checks for explicit use of `===`
Fix an error in `MultilineIfThen` cop that occurs in some special cases.

* there's a when...then inside the body of an if
* there's a commented-out then after an if
* then is on its own line
Merge pull request #230 from jonas054/fix_multiline_if_then

Fix an error in MultilineIfThen cop that occurs in some special cases.
Code style
Add column tracking

This is the first step towards solving #199
Port SymbolArray cop to AST::Processor
Fix #231 - modifier if false positive
Fix #233 - report syntax cop offences
Fix broken spec
Update changelog
Update Changelog for 0.8.2
Fix if/unless modifier check