Use the proper data type for bool.
Use REFERENCE_TIME in a few more places instead of LONGLONG.
contrib/sign.bat: Fix paths with spaces.
VSFilter/installer/build_installer.bat: remove quotes from vars.
TextPassThruFilter: move the classes to the header file.
Rename var for consistency.
Make a couple of functions constant.
Update Changelog.txt.
MainFrm.cpp: simplify check