leave retries for the storage layer
add logging to zipkin-zookeeper
bug fixes. left over debug code that should have been removed
sync oss
Fix .thrift compilation errors

For some reason, the .thrift files won't compile with the
scrooge-sbt-plugin.

- Bump scrooge to 3.16.1
- Replace //-style comments with #-style comments
- Import statements for:
  - com.twitter.algebird.Moments
  - com.twitter.util.Time
  so thrift conversions compile

Add imports
Add hadoop job for analyzing spans

- Implement SpanSource for Cassandra
- Fix bug in zipkin-cassandra where Dependencies
  weren't stored correctly
- Add Stopwatch.java - a hacky solution to some
  classpath problem/MethodNotFoundException
- New module zipkin-aggregate with Scalding job
- Readme file for running the job
Add web UI to aggregates

Draws a directed graph that shows the dependencies between
services. Based upon aggregated data from the Scalding
job in zipkin-aggregate.

- Add new web endpoint, /aggregate
- Import dagre-d3 via bower
- Add javacript to render JSON result from /api/dependencies