Implemented task 1 with tests and makefile

The current implementation is limited to five digits.
Rewrote split method to handle an arbitrary number of digits
Rewrote split method to handle negative integers correctly
Renamed test methods to lovercase first
Generalized makefile
Stubbed out basic implementation of task 2
Extended OddSum to handle even bounds
Extended OddSum test for correct arguments (Task 2)
Added task description (task 2)
Implemented main method with user interaction (task 2)
Added templates from teacher (task 3)
Implemented classes from stubs (task 2)
Moved diameter calculation in Sirkel into a separate method (task 2)
Added comments and removed superfluous code
Added html file with task descriptions

Downloaded from http://www.iu.hio.no/~evav/ProgrammeringH2013/Obliger13/oblig1H13.html
Added makefile rule to create a tgz-file
Merge branch 'oblig1'