Revert "Made some tweaks to the grid system"

This reverts commit 31931f88c61738ebc50d3e71125140a62de26eef.
Added Daniel's Code to local changes
Made some changes to the rounding in the new isBrickAt
Working on isBrickAt, not finished and this commit was made so I could pull for Daniel
Merge branch 'master' of github.com:xram-co/lego