Merge pull request #4 from Tilka/master

Add test for fctiwz.
Replace makefiles with a CMake based build system.
Update readme for the new build process.
Split tests into appropriate subtests.
Remove (now) pointless source subdirectory.
Readme: Add information on how to retrieve test results.
Some changes in the new build system

Added a global "run" target as well as individual "run_$name_of_test"
targets for each test. If you use the "run" target, please always call
it with -j1.

For building, make's -j option should better be set using the MAKEFLAGS
environment variable.
Readme: add note about MAKEFLAGS
Merge pull request #7 from Tilka/build_system

Some changes in the new build system
Add test for frsp
Merge pull request #6 from Tilka/frsp

cputest: Add test for frsp
Tests 13-15 wern't being run. Test 14 was incorrect.
Merge pull request #5 from phire/fixup-clipping

Fixup clipping