An extension that automates certain strategies on Henry Liou's picross game
This extension helps to automate certain repetitive strategies on Henry Liou's picross game (http://liouh.com/picross/). Currently, there are two strategies. The row and column summing strategy, which sums the numbers and spaces between them in a row and then fills in blue tiles that must be there. The edge strategy does two things. First, if a blue cell is near an edge, it takes the first or last hint and then either fills in blues after that or fills in a grey on the edge, if the first hint is too short to reach. Then, if a block on the edge is complete, it caps it off with a grey. When the edge strategy is selected, this process is repeated until it makes no more progress.