Ruby Tracker: bumped git submodule to 0.2.0 (fixes #939)
StorageLoader: bumped to 0.3.2
StorageLoader: removed EMPTYASNULL for loading JSONs (fixes #942)
Scala Stream Collector: fixed broken link to `thrift-raw-event` (fixes #955)
Node.js Tracker: added git submodule. Version 0.1.0 (fixes #949)
EmrEtlRunner: fixed @jobflow.ec2_subnet_id not being set due to incorrect guard, thanks @rslifka! (fixes #956)
Updated broken git submodule links

I'm new to this repo but am assuming that these links should have been pointing to their git repositories.  Previously they were broken, I'm assuming you recently refactored some of this.
targetUrl field missing

Storage loader's sql assets have targetUrl but not the json schema
StorageLoader: added missing targetUrl field to ad_impression JSON Path file, thanks @gisripa! (fixes #951)
Hive Storage: bumped table-def.q to 0.2.0
Hive Storage: added and removed fields to synchronize with 0.9.6's enriched event format (fixes #965)
EmrEtlRunner: bumped to 0.9.1
StorageLoader: made providing jsonpath_assets optional (fixes #958)