Fixes#2147.
This potentially addresses the issues reported in #2147 where Keyman
would crash due to a race condition as a critical section was not
deleted before attempting to recreate it.
Some logging has been added for debugging these issues.
Also fixes memory leaks and another race on startup relating to loading
the taskbar icon.
There are still some known memory leaks because DLL_THREAD_DETACH is
not called for all threads before keyman32.dll is unloaded, so those
threads don't get the opportunity to clean themsselves up. However, the
key danger with the csGlobals critical section has been addressed.
[Windows] More tidyup and robustness for metro app support - debug cleanup and serialization of input (not quite finished)
[windows] Refactor serialized input code when used with key event thread model
[windows] Add consistent precompiled headers for other projects
[windows] Merge console window test into metro support
[Windows] Tidy up work and identify additional TODOs for metro-style app support
[Windows] Ensure error case falls through to default hook processing for console windows
[Windows] Refactor shared memory into memory mapped file so we can cross 32-64 bit boundary
[Windows] Tweaks to C++ security calls and parameters
[Windows] Start refactor of SerialKeyEvent* classes
[Windows] Rename to SerialKeyEventServer (refactoring)
[Windows] Complete refactoring of SerialKeyEventClient class
[Windows] Further encapsulation and cleanup with 'interfaces' to reduce header pollution
[Windows] Complete serialization fix with move of modifier state management from client thread to server thread to guarantee consistency
[Windows] Replace atom-based keyboard switching with memory mapped file indexed to avoid security constraints
[Windows] Fixup Left Alt+Shift interaction with serializer
[Windows] Use Windows 8.1 SDK for test
