Add interpolate experiment
Add interpolation functions to birds.js
Interpolate a predefined number of particles
Merge branch 'master' into interpolate

Conflicts:
	viz/js/birds.js
Add comment line
Add mvi lib
momentjs instead of datejs, better library +  formatting of datetime in input
Merge branch 'design-navigation' of https://github.com/enram/bird-migration-flow-visualization into design-navigation
datetime format with 24h format
Fix particle opacity bug

Opacity layer was drawn for each particle, creating 300 layers,
effectively hiding all particle trails.
Make vectorscale dependent on view.height
Animation goes on and on and on and on...
Merge nice time + correct indentation
Add class places to cities
Merge master
Use play-pause button and forward/backward icon
Uh oh... They're respawning...
Merge branch 'interpolate' of https://github.com/enram/bird-migration-flow-visualization into interpolate

Conflicts:
	viz/js/birds.js
Merge branch 'interpolate' of https://github.com/enram/bird-migration-flow-visualization into interpolate