Added in iglu schema paths
wrapped main unstructured event argument and context in their respective schemas
Removing event vendor argument
Adding event vendor argument back in
Adjuting tests to handle new schema wrappers
Removing name and event_vendor arguments as in issue #19
Updated track_screen_view to send self-describing screen_view JSON as in #21
Adjusting some tests to handle vschema arguments, and to allow for removed name and event_vendor arguments in track_unstruct event. Will require another commit for base64 test
Adding in forgotten {
Adjusting base64 unstructured event test
Merge branch 'unstructured_vschema' of github.com:ebear/snowplow-ruby-tracker into ebear-unstructured_vschema

Conflicts:
	lib/snowplow-tracker/tracker.rb
Merge branch 'ebear-unstructured_vschema' into feature/0.2.0