fix model creation
rename directive and add bar chart
Merge branch 'master' into develop

Conflicts:
	angular-chart.js
add JSON edit directive
Merge branch 'demo' into develop
relace nvd3 with c3
Introduce grunt for jshint and travis
update dependencies version numbers
remove old code
include testing
use firefox on travis
add lcov coverage
add lcov coverage
test scope initialization
add "grunt watch" task for tests
include coverall calls
test of new travis config
second try to fix coverall
include ci and coverage results
update depenencies