Added images and margins to game boxes

All games now have a centered thumbnail that is a test image for now.

I have added a margin to the game boxes so that the title and text don't
start at the leftmost boundry of the box

I need to correct the back background so that iut extends to cover the game
boxes, the current teqnique seems to work okay for pure text contents.
Fixes base.css so rest class covers block elements

Previously the rest class would make divs extend over most contents, but
not the game boxes as they are artificialy extended.
Corrected game headers, seperated thumbnail files.

Made game headers and all links grey

Made each game box referance a different thumbnail png file so i can
update them indevidualy later.
Added color and correct mobile number.
Added correct game thumbnails.

Thumbnails are slightly smaller, but this doesn't cause issues.
Improved general site.
Merge branch 'index_styling' into development