better format for travis
add js post aggregator support
version bump
Merge branch 'master' into js_post_aggregator

Conflicts:
	ruby-druid.gemspec
add chaining having support
improve having chaining
use serializable module for js post agg
remove unset method hack from having
Merge pull request #24 from liquidm/js_post_aggregator

add javascript post aggregator
semicolon for js example in readme
Allow to add filter for values excluding in hash format