Merge pull request #49 from magjac/master

Fixes for two node label bugs (2nd attempt)

#28 Also digraph can be strict.

mstefaniuk/graphviz.it#17 Handling multiple edges between nodes when …

…they are defined in separate subgraphs.

Upgraded viz.js to 1.5.1

Dist with fixed PNG generation.

Added parsing of port when identifier is quoted.

#19 Dist files and test of text alignment.

Disabling zoom tests.

License change!

Fixed undirected graph xdot parser.