Issue-71: Add weightage to the increment calculations.
Issue-71: Add weightage to the increment calculations.

 - R.easing_formulas attach appropiate weightage for the increment calculations.
 - The iteration is incremented with UNIT_INERVAL if there is no timestamp being provided.
 - The weighted value of the time progress is being mapped to the increment requirement from the starting value.

fusioncharts/redraphael,AyanGhatak/redraphael,AyanGhatak/redraphael,fusioncharts/redraphael,fusioncharts/redraphael,AyanGhatak/redraphael