- PtyProcess package now contains a patched and statically linked version of libwinpty.

- winpty is from now on the default pty backend on Windows platform. No WINPTY flag is required to activate it.

- Since winpty requires an agent executable, I have also added PtyAgent to both TerminalCtrl nest on UppHub and to upp-components/Core.

- After building the PtyAgent, just move the resulting exacutable (PtyAgent.exe) to your apps executables directory.

- Package is tested with CLANG. MSC will follow...