Reworking the logging services, using Raygun.io
Merge pull request #413 from bratsche/lumberjack

Reworking the logging services, using Raygun.io
Implemented 'Bug 15248 - CRNL vs NL policy setting warning is too
obtrusive'.
Bump nrefactory.
[core] Use a csproj reference, not dll reference, for raygun

Now it will build as expected
[SourceEditor] Fixed old cairo API.
Bump xwt and md-addins
Bump xwt and md-addins
[Core] Log{Internal,Critical,Fatal}Error now Log(LogLevel.Error) in addition to ReportUnhandledException.
Change the submodule path
Use raygun4net submodule from mono instead of bratsche
Merge remote-tracking branch 'upstream/master'