Add New Function for stopping observation

Merge pull request #5 from BartKrol/observer-stop

Adds API function to disable scroll/wheel observation

v0.1.0: Merge pull request #3 from andreasonny83/master

event-infinite-scroll v0.1.0

Support Polymer 1.0

v0.0.4

#2 Fit for developing tools updated polymer 1.0

For those initially no scroll

If there are no scroll in the initial, mouse wheel also trigger the event