Converted ComputeConstantValueAction.
Ported 'CheckIfParameterIsNullAction'.
Ported 'ConvertAnonymousDelegateToLambdaAction'.
Fixed/Ported 'ConvertAssignmentToIfAction'
Fixed/Ported 'ConvertEqualityOperatorToEqualsAction'.
Fixed 'ConvertEqualsToEqualityOperatorAction'.
Fixed 'ConvertDoWhileToWhileLoopAction'.
Fixed 'ConvertDecToHexAction'
Improved speed of various actions.