Refactored the SrcMLGlobalService and SrcMLDataService to have a common parent in order to standardize the start/stop monitoring functionality.
Merge branch 'master' of https://github.com/abb-iss/SrcML.NET
Moved the GUIDs to the GuidList class.
Improvements to the (currently unused) SrcMLDataService class.
Removed reference to the expression parsing test package.