FMSLogo Code

Add the behavior when READCHAR is reading from a binary file.

Improve READCHARTEST.SMOKETEST so that it tests calling READCHAR on a file that has been opened for text reading and one that has been opened for binary reading.

Add a regression test that you can open and open file, provided that the subsequent filename has a different case than the original.

Centralize the logic for invalidating a rectangle in a way that honors the zoom factor and scroll positions.

Make the core logo code buildable with a Microsoft compiler.

Move some OWL-specific classes from main.cpp to mainwind.cpp.

Make logomath.cpp compile/link with non-Borland compilers.

Refactor header files so that init.cpp can be compiled into the screensaver.

Fix typo in #error

Fix location of declarations for functions in devwind.h and graphwin.h.