Restructure

This restructuring is needed to provide proper python package project. Please see the diffs for changes. No functional changes should be done, only restructuring related.
When I run
````
psebek@localhost ~/projects/waktu ±308f450 » make install 
`````
package is installed to CURRENT folder to subfolder usr. In my case ~/projects/waktu/usr. I believe it should be installed to /usr. Where is defined $(DESTDIR)?