Rebuild css for div layout
rebuild grid with divs
recalculate grid dimensions for div margins rather than table borders
add hack to fix slightly off positions
remove unused in function init_grid
add object parameters for columns, rows and gutters
add methods to set column and row parameters
build variable sized grid
remove default css values that will always be set in javasript
add ability to set left / right margins
fix bug calculating all midpoints by width only
add ability to set top / bottom margins
remove debugging style
Scale background image to fit container
place cell height sizes on row elements for row height consistency
border box new boxes to better align with grid
dynamically set cell top padding to vertically center text
remove debugging code
Merge pull request #6 from thetimpanist/master

Custom grid sizes by Chuck :+1: