Feature request: Combine coverage results (e.g. for different platforms like Win32 and Win64) #43

Sometimes it's unavoidable to end up with IFDEFed code, the most common probably due to platform differences.

For those cases it would be nice, if the coverage results of 2 or more runs could be combined.

Either the results would need to be stored and then added on subsequent runs or DelphiCodeCoverage would need to be able to read several .map files and run several .exe