build - avoid using all CPU resources on multiprocessor box

It was slowing down my machine too much, so rather than maximum we use
max(maximum - 2, 1).
flip2mono - intial commit of data
flipflop - initial commit of data and styling of <pre>
guessnum - inital commit of data
hex - initial commit of data
style - make <code> tags similar to <pre> tags background and colour

Rather than grey background with red text make it dark green
background with white text.
liteit - initial commit of data
makebridge - initial commit of data
issues - add note that liteit is a favourite of mine
liteit - fix typo in description about syntax of puzzles
issues - add issue for masyu game, can't delete bridges
masyu - add data for masyu
maze - add issue where start menu shortcut doesn't work
maze - add data for game
mazemaker - initial commit of game data
issues - add note about mirrormaze being particularly good
mirrormaze - add data for game
mirrors - initial commit of data
issues - add moneydrain as another interesting game
moneydrain - add game data