Merge pull request #1 from djkoberstein/master

.gitignore & nuget Monogame dependencies, removes XNAHelper by using a service to get the accelerometer
added time to death and time adding powerup
added large timer in the background, fixed slime spawn and clamping.
added red flash for taking damage
added speed effect and did some refactoring
adding slow motion update refactoring
added reference to mising content files and removed XNAHelp proj reference again.