Knapsack 1.3.2.0

- new: support for Elasticsearch 1.3.2
- new: all knapsack actions are reimplemented as Java API transport actions
- new: Elasticsearch bulk format support
- new: byte progress watcher, splitting into more than one archive file by byte size
- new: _push action for copying indices
- new: _pull endoint for fetching indices
- new: index aliases recorded in archive file
- new: archive codec API
- removed S3 support - use ES snapshot/restore for this
- added numerous junit tests
- switch to bzip2 implementation of https://code.google.com/p/jbzip2/
- switch to JDK ZIP archive implementation
- cleaned up tar implementation
- _state action overhaul
- _abort action overhaul
- optinal URI encoding of archive name entries
- new diagram
- added CREDITS
- added Apache License in source files
- tests: switched from log4j to log4j2