Merge pull request #10 from Concurix/master

Floyd-Warshall a corner case
Add test for allShortestPaths with multiple edges
Prep v0.3.1 release
Bump version and set as pre-release
Some build / release improvements
Initial pass at new documentation
Prep v0.3.2 release
Fix to release script
Bump version and set as pre-release
Improvements to `Digraph` documentation
Improve `Graph` docs + fix links in `alg` docs
Add some more doc for `alg` module
Provide examples for `alg` module

Fixes #11
More doc fixes + doc graph converters
Add syntax highlighting to documentation

Fixes #12
Prep v0.3.3 release
Bump version and set as pre-release
Fix typo
Small cleanups to Makefile
Minor tweaks to package.json