Revert to API 22 until travis supports API 23

Author: bmarrdev

CHANGELOG.md

@@ -8,9 +8,6 @@ v0.9.4
 - Added support for 0 duration move events (no animation)
 - Changed default move effect animation duration from 2000ms to duration calculated by total series spin duration
 - Deprecated function DecoView.getSeriesItem(int index). Use DecoView.getChartSeries(index).getSeriesItem()
-- Updated compileSdkVersion 23
-- Updated buildToolsVersion "23.0.0"
-- Updated targetSdkVersion 23
 
 v0.9.3
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