CodeCoverage: Branch Merge moved to NextOpenCover

Next OpenCover SequencePoint has new Branch(Exit)Coverage attributes.
bec => BranchExitCount
bev => BranchExitVisit
CodeCoverage: FileID/Document SequencePoint Attrs

Fixing [CodeContractClass/For] using SequencePoint fileid/url XML
attributes
CodeCoverage: Use new OpenCover attributes

Now is simpler/cleaner to find start/final SP
Remove obsolete methods & code
CodeCoverage: CCMethod FileID and SequencePoints

CodeCoverageMethod:
New method property .FileID
Filter Visited & Unvisited SP by Method.FileID
CodeCoverage: CCControl SequencePoint filter

CodeCoverageControl: Do not show SequencePoints from another file
CodeCoverage: Remove obsolete BranchPoint code
CodeCoverage: Null reference fix, remove Debug ...

CodeCoverageMethodElement:
Null reference thrown because Tests does not contain new attributes,
fixed.
Debug.Fail breaks Test, removed.
CodeCoverage: Test
CodeCoverage: Applied SD5 suggestions
CodeCoverage: Tests
CodeCoverage: OpenCover 4.5.2506 Binaries

https://github.com/OpenCover/opencover/releases/tag/4.5.2506
fix fileName comparison in MoveTypeToFileContextAction
fix #361: ApplicationException in code editor related to semantic highlighting
Fix #358: NullReferenceException on closing dirty xml file
Fix #352: Folding for Razor files crashes.

When changing a file extension to be a razor file make sure that
any existing folding manager is uninstalled before installing a
Razor folding manager.
Fix #333: Unable to save WiX file.

Allow saving of an updated WiX file when it has been edited in the
Setup - Files view.
fix #351: "Save as" dialog for C# files has default filter for .cshtml
fix #308: Creating a new .NET 4.5.1 project results in a .NET 4.0 project
fix #232: Raise DataObject events on clipboard and drag'n'drop operations in AvalonEdit
Merge commit 'bb8213bf'