Threadsafety for avahi to fix travis
Fix VS2012 build
Merge pull request #137 from tribal-tec/master

Threadsafety for avahi to fix travis
Merge pull request #138 from tribal-tec/vs2012

Fix VS2012 build
Real fix for avahi (native and compat) w/ multiple threads
Bump CMake subtree to fix PackageConfig
Subproject fix
Merge pull request #139 from tribal-tec/master

Real fix for avahi (native and compat) w/ multiple threads