Added parsed xhr response as second arg to callbacks
Merge pull request #17 from stevenvergenz/master

Added parsed xhr response as second arg to callbacks
Added XAPIStatement and agent parsing
More work on XAPIStatement and sub-objects
Initial completed draft of Statement objects
Hardening
Added some new functions to statement object
Updated example, added class documentation
Noted one more use case for statement constructor
Split off statement API into separate file
Updated README with new statement example
Added polyfill for b64 and sha1 functions
Added minified lib
Added minification instructions, renamed test file
Added crypto dependency, updated wrapper build date
Updated Agent bug with parsing sha1sums
Updated README with new examples for statement objects
Merge pull request #18 from stevenvergenz/master

Added statement wrapper, minified dependencies
Minor fix to Activity
Fixed assumption with context activities