added khan vis content
use relative data path
cahnged data path
updated readme with WIP notice
added dev note
Merge branch 'master' into khan
Merge branch 'master' into khan
Merge branch 'master' into khan
Merge branch 'master' into khan
fixed character encoding problem
Merge branch 'master' into khan
added settings options
refactored structure and fixed edgeID bug
a bit of code cleaning
fixed inf recursion bug when graph contains a cycle