Merge pull request #30 from confidenceJuice/feature-addParseAnalytics

Feature add parse analytics
add HeapAnalytics as subspec
add external constant for heapAppID
add HeapAnalyticsProvider.{h,m}
import heapAnalytics provider in ARAnalyticsProviders
declare and implement setupHeapAnalyticsWithApplicationID:
implement initWithIdentifier:
add user property and event methods
call setupHeap in setupAnalytics
bump version
update changelog / self praise
add external constant for heapAppID
declare and implement setupHeapAnalyticsWithApplicationID: