Bump browser utils to 1.13 and add unit test.
Change scala-common-enrich to pass network_userid

* Change unit test in scala-hadoop-enrich to send
  networkUserId in on the Thrift Object

Conflicts:
	3-enrich/scala-hadoop-enrich/src/test/scala/com.snowplowanalytics.snowplow.enrich.hadoop/good/LzoThriftTest.scala
Added enrichment schemas (#803)(#804)(#805)(#806)
Removed enrichments from EmrEtlRunner config.yml.sample and created example enrichments folder (#809)
Added name and vendor fields to sample enrichment JSONs (#809)
Replaced "quartets" with "octets" everywhere (#547)
Added etl_tstamp to atomic.events (#819)
Added etl_tstamp into Scala Hadoop Enrich (#396)
Stored etl_tstamp in new field in CanonicalOutput (#818)
Added etl_tstamp field to EtlJobConfig case class
Fixed tstamp typo
Redshift: Bumped table-def to 0.4.0
Postgres: bumped table-def to 0.3.0
Postgres: added etl_tstamp to atomic.events (#819)
Scala Common Enrich: stored etl_tstamp in new field in CanonicalOutput (#818)
Updated tests with etl_tstamp
Changed "etl_timestamp" field of EtlJobConfig to camel case
Redshift: remove event_vendor and ue_name and rename ue_properties to unstruct_event (#834)
Postgres: removed event_vendor and ue_name and renamed ue_properties to unstruct_event (#833)
Fixed case
Scala Common Enrich: removed event_vendor and ue_name and renamed ue_properties to unstruct_event (#836)
Scala Hadoop Enrich: removed event_vendor and ue_name and renamed ue_properties to unstruct_event (#835)