Implemented code issue message suppression.
CodeDom visitor now skips new lines & white spaces.
Fixed async lambda/delegate completion.
Language version can now be set.
DepthFirstAstVisitor no longer tries to visit the children of non C#
ast leaf nodes.
(Speeds up visitors a bit)
CanBeDemotedIssue now respects the
CA1011:ConsiderPassingBaseTypesAsParameters suppression.
Implemented resharper disableing for redundant using directive.
Merge branch 'master' of https://github.com/ciplogic/NRefactory