Further API cleanup, many warnings added where things need to be done.
created libqsrt, moved files appropriately
Added infrastructure for API documentation
I started to document the classes in libqsrt and to write unit tests for every
feature that appears in the documentation.
srtSurface is now documented, and a set of unit tests has been written.
Added test widget, to help further API development.
Workaround for clang compiler problem.
Further work on srtTestQt, which revealed two errors in srt. Added unit tests
to demonstrate the errors.
Add mock-up slider functionality to the GUI