Updated Block, BlockDrawer, Main, TouchBlock, Added BlockGrid, RemoveAction

* Updated Block to use Vector2 for storing position
* Updated BlockDrawer with a remove block function
* Updated TouchBlock to have a link to block below and above it and changed functions to use Vector2 from Block
* Added BlockGrid which stores a 5x5 array of TouchBlocks sets block size as well as overall grid position based on size of screen
* Added RemoveAction which currently debugs by coloring blocks above and below, also removes block when touch occurs
* Updated Main to use BlockGrid versus array in code as well as removed testing code, removed a lot of extraneous testing code as well and old comments