Add Git ignore file
Remove OneValueCostProcessor due to 'Speculative Generality' smell.
Update plugin dependency to the 4.0 version of SonarQube API - versioning
and API Deprecation Strategy
Update Violation<->Processor wiring to process appropriate the SQUID
repository rules.
Remove deprecated Violation with Issue implementation.
Convert Toxicity Chart widget from Ruby on Rails Page to Ruby on Rails
Widget.