Merge pull request #1 from jaros/master

poker implementation with TDD approach
split base packages into code examples, base code for excercises and
sample solutions; cleaned up code formatting; removed redundant test;
renamed classes
extracted if condition into one-line private method
showcasing introduction of wrapper object for group of cards (step 1:
using inheritance from original map)
simplified condition
added (failing) test for straight starting with Ace (as 1)
renamed and refactored sample solution
applied newspaper-like sorting of method order
implemented special case for straight beginning with ace
vertical formatting