Added word detection

Board now detects when a tile is pressed, and processes it to see if
that placement completed a word.
Merge branch 'master' of https://github.com/NameLess-exe/dynamic-junior-scrabble

Conflicts:
	src/scrabble/rabble/BoardActivity.java
	src/scrabble/rabble/ClientActivity.java
	src/scrabble/rabble/MainActivity.java