libfreerdp-core: add true asynchronous input and update
libfreerdp-core: start working on asynchronous channels
channels/serial: code cleanup
Merge branch 'master' of github.com:awakecoding/FreeRDP
Merge branch 'master' of github.com:FreeRDP/FreeRDP
xfreerdp: call XInitThreads()
Merge pull request #962 from awakecoding/master

Asynchronous Update and Input