CodeCoverage: Fix Module Coverage % display

CodeCoverageResults:
Filter-out compiler generated methods
CodeCoverageTreeNode:
GetNodeText() Display Rounded BranchCoverage %
GetPercentage(): Prevent divide by zero
CodeCoverageMethodsTreeNode:
Increased BranchCoverage % precision

src/AddIns/Analysis/CodeCoverage/Project/Src/CodeCoverageMethodElement.cs

@@ -290,7 +290,7 @@ namespace ICSharpCode.CodeCoverage
 
 		decimal GetBranchCoverage () {
 			
-			return this.BranchCoverageRatio != null ? decimal.Round( ((decimal)(this.BranchCoverageRatio.Item1*100))/(decimal)this.BranchCoverageRatio.Item2, 2) : 0m;
+			return this.BranchCoverageRatio == null ? 0m : ((decimal)(this.BranchCoverageRatio.Item1*100))/((decimal)this.BranchCoverageRatio.Item2);
 			
 		}
 

src/AddIns/Analysis/CodeCoverage/Project/Src/CodeCoverageMethodsTreeNode.cs

@@ -40,7 +40,7 @@ namespace ICSharpCode.CodeCoverage
 			Name = name;
 			VisitedCodeLength = visitedCodeLength;
 			UnvisitedCodeLength = unvisitedCodeLength;
-			VisitedBranchCoverage = branchCoverageCount == 0 ? 100 : decimal.Round(branchCoverage/branchCoverageCount,2);
+			VisitedBranchCoverage = branchCoverageCount == 0 ? 100 : branchCoverage/branchCoverageCount;
 		}
 		
 		void AddDummyNodeIfHasNoMethods()

src/AddIns/Analysis/CodeCoverage/Project/Src/CodeCoverageResults.cs

@@ -116,7 +116,9 @@ namespace ICSharpCode.CodeCoverage
 		CodeCoverageMethod AddMethod(CodeCoverageModule module, string className, XElement reader)
 		{
 			CodeCoverageMethod method = new CodeCoverageMethod(className, reader, this);
+			if (!method.Name.Contains("__")) {
 			    module.Methods.Add(method);
+			}
 			return method;
 		}
 		

src/AddIns/Analysis/CodeCoverage/Project/Src/CodeCoverageTreeNode.cs

@@ -88,7 +88,7 @@ namespace ICSharpCode.CodeCoverage
 		{
 			if (TotalCodeLength > 0) {
 				if ( visitedCodeLength == TotalCodeLength && visitedBranchCoverage != 0 && visitedBranchCoverage != 100 ) {
-					return String.Format("{0} (100%/{1}%)", Name, visitedBranchCoverage);
+					return String.Format("{0} (100%/{1}%)", Name, decimal.Round (visitedBranchCoverage, 2));
 				}
 				int percentage = GetPercentage();
 				return String.Format("{0} ({1}%)", Name, percentage);
@@ -98,8 +98,7 @@ namespace ICSharpCode.CodeCoverage
 		
 		int GetPercentage()
 		{
-			int percentage = (visitedCodeLength * 100) / TotalCodeLength;
-			return percentage;
+			return TotalCodeLength == 0? 0 : (int)decimal.Round((((decimal)visitedCodeLength * 100) / (decimal)TotalCodeLength), 0);
 		}
 		
 		void SetImageIndex()