Fixes compilation error to accomodate multiple generic constraints in CharStream.

[ERROR] /Users/bone/git/boneill42/druid/indexer/src/main/java/com/metamx/druid/indexer/HadoopDruidIndexerNode.java:[100,39] cannot find symbol
[ERROR] symbol  : method toString(<anonymous com.google.common.io.InputSupplier<java.lang.Readable>>)
Eclipse formatting file.  (only what I inferred from a few files)
Merge branch 'master' of https://github.com/metamx/druid
Added diagram for segment propagation (with websequence text)
Merge pull request #141 from boneill42/sequence-diagram

Sequence diagram for segment propagation.