alter a few things to make assertions work
squash
squash
basic assertions working
Merge branch 'master' into assertions
Merge branch 'master' into assertions

Conflicts:
	www/scripts/celestrium
	www/scripts/main.js
Merge branch 'assertions'

allow assertions to be shown as nodes

Conflicts:
	README.md
	www/scripts/celestrium
decouple knowledgebase from graph type
Update README.md
Create CONTRIBUTING
make conceptnet assertions work
Merge remote-tracking branch 'refs/remotes/origin/refactor' into refactor
Merge pull request #16 from jdhenke/refactor

decouple knowledgebase and node type