Changes by Vu Tran
Documentation for all method calls
bool to BOOL
Added MIT license
NSLog to AmplitudeLog calls for debugging
Getters for testing
Removed campaign tracking code
Renamed globalProperties to userProperties
Renamed customProperties to eventProperties
Removed redundant saving of apiProperties in each event
Removed mac address, advertiser ID from user tracked
Switched to identiferForVendor, otherwise randomly generated ID
Changed docs link to point to github
Updated Amplitude.h method descriptions
Changed reupload to only occur when beyond the number of max events to store locally
Updated README to reflect most recent commits
Changed max events from 1020 to 1000