[win32] use MSBuild.exe or devenv.com (if available) in BuildSetup.bat to get verbose console output
[win32] cosmetic in BuildSetup.bat
[jenkins] - do the mingw build in a backgroundthread and echo "." on the foreground thread for giving continuous output to the jenkins slave - should fix the disconnect issue on win32 slave
Add #include guards for HAS_PYTHON

This fixes compile of Addon.cpp and Weather.cpp if HAS_PYTHON is not defined
Remove Python dialogs when compiling without Python

cherry-picked from https://github.com/plexinc/plex-home-theater-public/commit/f76df3e72
Retain type safety by using const_cast instead of C-style cast
Merge pull request #2868 from Montellese/win32_msbuild

[win32] make BuildSetup.bat et. al. more robust for jenkins builds
[depends] - bump mdnsresponder to 379.37
[zeroconf] - add new hostname field to the service class - its needed by mdns
[mdns] - fix service resolving when using mdns-embedded
- don't call our dnsresolver in the callback but try it in the zeroconf thread instead
- if that fails (as it does in some networks/platforms where gethostbyname doesn't resolve .local. domains) - fallback to the mdns resolver
[mdns] - enable zeroconfbrowser via mdnsembedded - as the browsing/service-resolveing issue is solved now