use typeahead for search
Merge branch 'master' into selection
add concept and links to graph on concept search
working state during sprint

 - search around works
 - can adjust edge cutoff
make doubleclick select connected component
fix node whilst clicking
use github identicon as page icon

closes #15
only show relevant sliders

 - charge
 - gravity
 - connectivity

closes #13
implement keyboard shortcuts - close #2
only recolor nodes on selection changes; do not restart force layout

close #10
make nodes highlightable; closes #4
render nodes and labesl above links; close #6
rename to celestrium; create docs helper
create links to user guide and github repo
clean code and include notifications

close #21
Merge branch 'dev'