Merge pull request #12 from ben-oxley/master

Added two new patterns
add ben's patterns
Fail (slightly more) gracefully when no opencv
Merge branch 'master' of github.com:cillian64/thegrid
Further opencv gracefulness
Removed debug messages
Merge remote-tracking branch 'upstream/master'

Merged from main branch
Added snakegit statusgit statusgit status(win)