removes the java 1.7 only method
Merge pull request #270 from mosesn/1.6-compat

removes the java 1.7 only method
Merge remote-tracking branch 'origin/travisci-jdk6'
Merge pull request #267 from twitter/travisci-jdk6

Add openjdk6 to TravisCI config
Merge branch 'master' of github.com:twitter/zipkin
Added better support for Redis.

Fixed a bug in
zipkin-redis:com.twitter.zipkin.storage.redis.RedisSortedSetMap where a
Either[Future[ZRangeResults], Future[Seq[ChannelBuffer]]] was being returned instead of
a Future[ZRangeResults]. The method in question will always return a
ZRangeResult because it is getting a sorted map, so we simply get the
left item of the Either.

Added bin/collector-redis and bin/query-redis for easier
setup of the collector and querier with redis support.

Added zipkin-redis/config with the scribe configuration files for a
sample client and server. These are simply example files.
fix the redis server for travis
Add HBase backend

* Added zipkin-hbase subproject
* Created HTableFactoryWithExecutor to create HTables with a thread pool.
* Create HBaseTable, an async facade on HTable.
* Created HBaseStorage
* HBase storage puts serialized thrift into the zipkin.storage table
* Created HBaseIndex
* add the ability to globally assign an id to a string in HBase.
* Add hbase command to query and collector
* Changed indexSpanDuration to return Future[Unit].