make punctuation button part of prediction
Merge pull request #204 from OwenMcGirr/iss#203

make punctuation button part of prediction
add delete word option
add code to disable unnecessary buttons when the text view is clear
Merge pull request #205 from OwenMcGirr/iss#56

add delete word option
build common sorting array using unigram and bigram queries
mixing bigram and unigram frequencies using a weighted average
Merge branch 'develop' of https://github.com/KomodoOpenLab/TypeOver into iss153

Conflicts:
	TypeOver/TypeOver/ViewController.m