Added some test cases for 'RedundantArgumentNameIssue'.
Replace with oftype finds now another case.
Split out the additional oftype issues.
NullValueAnalysis: Introduced fast mode -- slighly less accurate mode that works for bigger methods.
Merge pull request #296 from mono-soc-2013/luiscubal-fix-null-analysis-slowness

NullValueAnalysis: Introduced fast mode
Fixed bug in 'RedundantExplicitArraySizeIssue'.
Fixed bug in 'ProhibitedModifiersIssue'
Removed debug code/fixed null reference in ReachabilityAnalysis.
Fixed some possible issues in reverse for loop action.
Fixed some compiler warnings.
Fixed bug in XmlDocIssue.
Fixed some issues in 'ReverseDirectionForForLoopAction'.
Fixed bug in 'ReverseDirectionForForLoopAction'.
Fixed bug in 'UseAsAndNullCheckAction' and
'RedundantExplicitArraySizeIssue'.
Simplify PatternHelper.AnyType
CecilLoader: Fix NullReferenceException when CustomMarshalInfo.ManagedType is null

This happened when loading Microsoft.Web.Tasks.dll
Synced/Fixed 'RedundantLambdaParameterTypeIssue'
Added 'RedundantLambdaSignatureParenthesesIssue'.
Added missing case to 'ProhibitedModifiersIssue'.
Fixed bug in RedundantLambdaSignatureParenthesesIssue