switch to the official scrooge-sbt plugin

Author: @sprsquish
Fixes #312
URL: https://github.com/twitter/zipkin/pull/312
fix specs dependency

Author: @sprsquish
Fixes #317
URL: https://github.com/twitter/zipkin/pull/317
fix cassandra search issue.

see https://github.com/twitter/zipkin/issues/310

Author: @fulinlin924
Fixes #314
URL: https://github.com/twitter/zipkin/pull/314
Move Zipkin-Web to TwitterServer

Cleaned up the build file a bit.
Moved off of Jerkson.
Removed all builders and ancient config styles in favor of TwitterServer.

Author: @sprsquish
Fixes #311
URL: https://github.com/twitter/zipkin/pull/311
Corrected link to zipkinCore.thrift

In the instrument.md documentation. The zipkinCore.thrift file is no longer
located under resources.

Author: @frenchfrywpepper
Fixes #322
URL: https://github.com/twitter/zipkin/pull/322
storm kafka spout
fix conflicts
update web runner script

Author: @sprsquish
Fixes #325
URL: https://github.com/twitter/zipkin/pull/325
move twitter specific configs out
Merge remote-tracking branch 'upstream/master' into storm
use scalaTest for testing
Create SpanStore + cassie example

Combine storage and index into a single concept. Stores should handle
indexing however they need and simply present a store/retrieve API.

Author: @sprsquish
Fixes #321
URL: https://github.com/twitter/zipkin/pull/321
fix storm-kafka version
make scheme.serialize outputs commmon.Span and dependency fix
fix dependency for storm-kafka
add kafka jar to the dependency
Merge remote-tracking branch 'upstream/master' into storm
add conjars to sbt resolver to fix build
update dep for kafka module, use Try and avoid java class cast
change test to funsuite and misc updates