Merge pull request #48 from LochNeffMonster/master

Simple Pause and Ending Menu
Added a ramp for AI testing
Some tweaks to the navmesh
Moved AI over to game scene

The robot is hovering in the air for some reason..
Nav mesh fixed

Still float but they follow you
Added house

added new house and some items.
added score gui with tally at the end of the game
changed time limit
Merge pull request #53 from LochNeffMonster/ScoreUpdate

Score update
added audiosource to the gamestate