Avoid strcmp() on std::string objects
Replace C-style <*.h> headers with C++-style <c*> headers
Remove several unused <cassert> includes
Move system headers to the end

This exposes some missing includes in a few files.
Add more dependency info for libgc
Compile the Qt gui
Use proper forward slashes
Convert images to png
Compile-in the images
Install files needed at runtime
Set the default progPath to where the data files are installed
Sort more system headers
Remove another Windows-ism
Update the list of files
Re-save UI and resource files with Qt Creator
Remove unnecessary formatting on tooltips
Simplify strings in the about box
Compile mypthread.cpp

Says it's needed for unix (and it is, prevents a crash), not sure why it
was commented out.