Adding the option of advanced mode to getGroups, and test.

Second step to be able to use advanced mode while playing
Left to do is in didAnyoneWin send this variable into
getGroups.
Use concat on both places not just the one.
Merge branch 'master' into addAdvancedMode

Conflicts:
	server/groups.js
Ability to select between rulesets
Merge pull request #4 from Albin-trialbee/addAdvancedMode

Add advanced mode