Grid changes and score

Changed grid position for future usage of area below grid.
Changed grid sizing, with maximum gem size and size relative to screen
size.
Added score and link length variables.  Score increases by 1 per gem
destroyed, plus 5 per 10 link length.
Revert "Grid changes and score"

This reverts commit 5a941bd0895ca81b23b5b6b525f9e31277d58de0.
Grid changes and score

Dynamic and maximum grid size.
Score and link length variables.