Return 1, not 2 for undirected self-loops for adj matrix
Rename 'adjacency matrix entry' to 'adj'
Add weighted adjacency matrix entry reporter
Add adjacency matrix setters

Closes #159.
Merge pull request #170 from Muon/master

Adjacency matrix changes
Add downward directed graph layout support

Closes #157.
Quick fix for #152

This adds a quick check for fixed points in WebCola's box packing
algorithm, so it doesn't go into infinite loops so easily.
Merge pull request #171 from Muon/master

Downward directed layout and WebCola fixes
Merge branch 'master' of https://github.com/langtech/snapapps
refactored out counter.js
added globals for linting
fixed linter errors
renamed counter.js to collections.js and generalized CounterMorph into MapMorph
renamed 'Counter' to 'Collections'
fixed MapMorph in firefox