added an click event
- create a new particle on the position user click on
added an argument - position
Various code optimizations.
Delete particles.min.js
add destroy method + opacity of interactive lines
update demo (show all params)
delete particles.min.js
update demo - display all params
new feature: push particles on click
Merge branch 'pr/11' into dev

Conflicts:
	particles.js
update demo / fix name space
add particles.min.js
Merge pull request #13 from VincentGarreau/dev

release 1.0.1