use bundler compatible ruby version string
Add tests for issue to reproduce behavior

Fix break_on_match issue while evaluating multiple patterns

Closes #1547

Make better exception message

Add more specs for inputs with arrays

Closes #1547
call vendor-geoip instead of $(GEOIP) in prepare-tarball
Closes #1563
Merge remote-tracking branch 'upstream/master'
Merge pull request #1532 from colinsurprenant/fix/gem_path

use bundler compatible ruby version string
Update ES version docs

ES version 1.0 or greater is now supported by all protocols.

The Elasticsearch eng team has tests to ensure client nodes from all ES versions >=1.0 work with all ES clusters version >=1.0