[henshin-dev] Path constraints

[Christian Krause <henshin.ck@xxxxxxxxx>]

Hi,

I added so-called path constraints to the match finder of Henshin. This can drastically improve the performance in cases where parts of the LHS are connected only by PACs. You can read more about it here: http://www.ckrause.org/2013/12/path-constraints-in-henshin.html

Cheers,

Christian