First try at making a locate plugin
minor alias for grunt test
Memory leak fix in sigma.classes.graph

The edges referenced in the edges indexes where actually not the ones stored in the sigma.classes.graph instance, but the ones given to it.
Leak found by @sheymann and showed in #340 (thanks!).
Merge remote-tracking branch 'origin/master' into lk-sigma
Improves locate plugin
Update locate README
Merge branch 'locate' into lk-sigma
Update gruntfile
Regenerate examples
Update build