Virtual packages are now colored differently
hide console window when in GUI mode (win32 only)
formatting
deal with exception when recommended or suggested mod is missing
C#-fu
command-line client now subscribes to moduleinstaller progress reports in verbose mode
removed unused headers
hm
added clear changes option (under Apply changes)
Merge pull request #256 from AlexanderDzhoganov/better_dependency_graph

Small GUI stuff