Merge pull request #10 from TessMyers/master

adds static visual elements, adds background image
Adds building image sources

Created image sources from photoshop outlines and manipulations of Tess's sketches
Merge pull request #11 from shanswami/master

Adds building image sources
fixes timed adds and starts playerScore model and view
Merge pull request #12 from biversen21/master

fixes timed adds and starts playerScore model and view
adds structure images for build functionality