Fix random
Fix random
Change getName to getSimpleName
Rrefactor AbstractDieTest
Trim code & add license
Merge branch 'step-1' into step-2
Merge branch 'step-2' into step-3
Trim code & add license
Merge branch 'step-3' into step-4

Conflicts:
	src/main/java/com/wmw/dice/CommonDie.java
Merge branch 'step-4' into step-5
Merge branch 'step-5'