cleanup zipkin-web a bit

Switch to new style of scrooge service types.
Use ThriftMux for the query client

Split ZipkinWeb into a factory that can be mixed into other Apps
Create a stats
filter

Author: @sprsquish
Fixes #331
URL: https://github.com/twitter/zipkin/pull/331
fixes for cassie

Exclude old versions of finagle and util from cassie's dependencies.
Switch endTs to be where the current setup expects it to be.

Author: @sprsquish
Fixes #330
URL: https://github.com/twitter/zipkin/pull/330
TwitterServer based Collector

Also included is a ScribeReceiver and an example project that shows how
a collector listening to scribe and writing to cassandra would be wired
up.

No
idea why this got closed with the last merge.

Author: @sprsquish
Fixes #327
URL: https://github.com/twitter/zipkin/pull/327
TwitterServer based query service

Author: @sprsquish
Fixes #332
URL: https://github.com/twitter/zipkin/pull/332
make zipkin collector factory composable

Author: @sprsquish
Fixes #333
URL: https://github.com/twitter/zipkin/pull/333
merge to master and solve conflicts