New Code issue Redundant Check Before Assignment

Expression.ToString check may be unrobust?
Added XmlDocIssue.
Fixed some locations in XmlDocIssue.
Splitted XmlDocIssue - added new
'CS1573ParameterHasNoMatchingParamTagIssue'
CS0127ReturnMustNotBeFollowedByAnyExpression now offers an alternative
fix.
Added 'CS0126ReturnMustBeFollowedByAnyExpression'.
Implemented default value generation for
'CS0126ReturnMustBeFollowedByAnyExpression'.
NullValueAnalysis: Renamed some parameters (previous name was misleading and confusing).
Added early support (and tests) for query expressions.
NullValueAnalysis: Fixed a few bugs that caused exception when batch analysing the MonoDevelop codebase.
Merge pull request #290 from mono-soc-2013/luiscubal-linq-null-analysis

Improvements to null analysis
Added actions to convert a method group to an anonymous method or
lambda expression.
Removed code issues & code actions from csharp assembly.
Added ICSharpCode.NRefactory.CSharp.Refactoring assembly.
Fixed project files & added new refactoring assembly to the unit
tests.
Script changes: Allow arbitrary text selections (useful when working
with comments).
Added AddExceptionDescription action.
XmlDocIssue is now using ICSharpCode.NRefactory.Xml for parsing xml
files.
Fixed a bug in the method group conversion actions.
Implemented the location calculation in XmlDocIssue.
Add missing IReadOnlyCollectionOfT to TypeInference.IsGenericInterfaceImplementedByArray