Fixes angular-slider#106 (rz-slider-on-change fires before value is c… …hanged)

Fix memory leaks that was brought by the clickOnBar feature. 

Fixes angular-slider#93. It was because the scope was not applied whe… …n the 2 values were the same.

Set version to 0.1.22 

Fix angular-slider#63 

Fix angular-slider#62 

Remove console.log. Fix angular-slider#64 

Presentation mode. Close angular-slider#57 

Bump version 

Fix angular-slider#54