Misc. Fixes

Channels code refactoring
MS-RDPEI improvements
WinPR internal optimizations
Fix XITouchClass detection
XCode monolithic build fix
Fix build without libXrender
Complete asynchronous transport
Fix IPP linking with monolithic build
Fix OpenSSL server-side null dereferencing
Fix 32-bit mac building, fix SSE with clang
Split mac client into framework and bundle