Merge pull request #4 from Data-Residence/master

InfluxDB - distributed time series DB
Merge pull request #5 from Data-Residence/master

Apache Phoenix - sql on HBase
moved ArangoDB to document and graph model
Merge pull request #6 from fceller/master

moved ArangoDB to document and graph model
Update index.html

Added a reference to neo4j as a graph database
Merge pull request #7 from dzlab/patch-1

Update index.html
OpenTSDB time series db on top of HBase