Update README [ci skip].

I hope it is OK to skip code review for this. :-)
Update README [ci skip].
Clean up CMakeFiles

Now source files, examples and tests are automatically added
instead of manually specified in the CMakesLists.
Merge pull request #4 from PetterS/CMakeCleanup

Clean up CMakeFiles
Add possibility to package as ZIP file.
Merge pull request #5 from PetterS/package

Add possibility to package as ZIP file.