fix dependencies

Merge pull request #25 from rnojiri/solr_facet_limit

Adding facet limits.

Merge pull request #24 from rnojiri/cors_handler

Allowing all methods to CORS calls.

Merge pull request #23 from rnojiri/cors_handler

Adding cors middleware lib.

Merge pull request #23 from rnojiri/cors_handler

Adding cors middleware lib.

Merge pull request #22 from rnojiri/rip_logger

Changing the log structure to use zap.Logger

Merge pull request #20 from alichtenthaler/master

Delete document in Solr package

Merge pull request #19 from rnojiri/zookeeper_config

Adding zookeeper configuration support.

Merge pull request #18 from rnojiri/solr_filter_queries

Upgrading uol/go-solr version.

Merge pull request #17 from rnojiri/solr_filter_queries

Child facet for block join queries.