Some fixes in the build script and tests
Released version 0.3.0
Released version 0.3.0
Added a description on how to publish
Improved overview image
Updated version number to 0.4.0-SNAPSHOT
Fixed a typo
Fixed some typos
Functions `select` and `unselect` on Items working
Implemented function `select` for the Timeline
Merge remote-tracking branch 'origin/develop' into alex_dev

Conflicts:
	dist/vis.js
	dist/vis.min.js