Finished key mapping in InputHelper. Now to look into loading from a file.
Updated all uses of IsPressed
Input update.
Merge branch 'master' of github.com:dkellycollins/DungeonCrawler

Conflicts:
	DungeonCrawler/DungeonCrawler/CharacterSelection/CharacterSelectionScreen.cs
	DungeonCrawler/DungeonCrawler/CharacterSelection/ContinueNewGameScreen.cs
	DungeonCrawler/DungeonCrawler/InputHelper.cs