keyman64.h is now only used by keyman32/keyman64. Shared components have
been moved to legacy_kmx_memory.h - KMX structures in-memory, as used by
kmanalyze, kmdecomp.

Removed unnecessary references to keyman64.h from kmtip.

Also removed aiDebugger.* which are obsolete files.

One day in the future, we could merge keyman64.h with keymanengine.h.

* moved ConvertUTF.h -> common/windows/cpp/include
* moved crc32.h -> common/windows/cpp/include
* moved keymansentry.h -> common/windows/cpp/include
* moved registry.h -> common/windows/cpp/include
* moved unicode.h -> common/windows/cpp/include
* moved xstring.h -> common/windows/cpp/include

and updated corresponding references. Deleted a bunch of old references
to missing headers from .vcxproj files. Updated vkeys.h and vkeys.cpp
references in .vcxproj to use $(KEYMAN_ROOT) instead of relative paths.

Adds a precompiled header for kmdecomp so that we can simply #include
"pch.h" in the common vkeys.h, and updates refs to vkeys.h for kmdecomp.

Moves vkeys.h to common, turns it into a proper header and adds
corresponding vkeys.cpp so that we don't include the data multiple times
in a project.

Removes duplication of vkeys.h in kmcmpdll and global/inc.

Updates all projects to reference the common files, except kmdecomp,
coming in the next commit, as it is more complex.

The name compiler.h was misleading, so renamed to legacy_kmx_file.h, as
it largely describes .kmx files. There are two declarations in the file
which are specific to kmcmpdll, at the bottom of the file, but
everything else is all related to the .kmx file format. (We may move
those in a future update to kmcmpdll, but that should wait until the
kmcmpdll cross-platform refactor is complete.)

Moved to common/windows/cpp/include/ because it is used by both
Developer and Windows projects.

Where possible, removed redundant references, as compfile.h includes
legacy_kmx_file.h anyway.

Moves compfile.h to kmcmpdll path and removes unnecessary dependencies on it.

Moves comperr.h to kmcmpdll path and removes unnecessary dependencies on it.

mcompile is the replacement for m-to-p.

Also makes common/windows/bin/tools more consistent.

Splits the script into separate scripts for each platform. Note that
this is only ever called from TeamCity builds.

Including test certificates in the repo is convenient, but not safe.
Each developer building Keyman should have their own test certificates,
which `nmake test-certificates` will do for them.

Updated instructions accordingly.