changes to .gitignore
backspace timer now invalidate on last letter
fixed a bug where backspace timer would start even with no text
backspace timer now invalidate if there was only one character
Merge pull request #53 from OwenMcGirr/iss#52

backspace timer now invalidate after last letter
storyboards now use autolayout
Merge pull request #55 from OwenMcGirr/iss#54

storyboards now use autolayout