Cocoapods + networking with AFNetworking lib
Updated travis to install dependencies via Cocoapods
Changed xcode_scheme in travis
Fixed travis to use workspace instead of project
Initial CHANGELOG for #5
Updated README for #1
TODO in README
Added getCarrierName for context info #18
Unnecessary comment
Initial SnowplowTracker class with init
Added getTransactionId and getTimestamp
Tests for new util methods
Documented SnowplowPayload
Documented SnowplowUtils
Added default init for SnowplowRequest
Documented SnowplowRequest
Removed unnecessary setters