Improve [histograms store]: send histograms(bins) stats into elasticsearch
Merge pull request #4 from Gasillo/histograms_store

Improve [histograms store]: send histograms(bins) stats into elasticsearch
Improve [proxy support]: correct work when ES is on behind proxy (nginx for example)
Merge pull request #5 from Gasillo/es_proxy_behind

Improve [proxy support]: correct work when ES is on behind proxy (nginx)
Merge remote-tracking branch 'upstream/master'