wait for active bulk requests after a run
Update readme to latest versions of es and plugin
Merge pull request #335 from Friss/master

Update readme to latest versions of es and plugin
JDBC plugin 1.3.4.0
- breaking: parameters for Elasticsearch renamed and moved out of "jdbc" part of river definition
- breaking: no more docs indexed for river state, moved to cluster state
- feeder: improved standalone feeder mode with multithreading and scheduling
- new: river can execute an array of river definitions concurrently by using "pipelines"
- new: column name map (useful for Oracle short column names)
- new: suspend/resume, closes #347
- update pom.xml profiles to latest driver versions (Derby, H2, hsqldb, MySQL, Postgresql)
- refactoring: most classes moved to package org.xbib.elasticsearch.plugin.jdbc
- pipeline architecture: a single river instance can execute multiple rivers concurrently
- RiverFlow class now threadsafe
- all source/mouth resources are closed between runs
- REST: river state actions, run river action
- bug fixes for river states stored at cluster metadata, closes #342, #353
- bug fix for handling null values, closes #344
- optional treating binary data as strings
- mysql/postgresql tests against "metawiki" data from http://dumps.wikimedia.org/metawiki/latest/
- cleaned up tests
JDBC plugin 1.2.4.0 (backport from 1.3.4.0)