Update all databases to their latest versions

[koppor]

Also update the ultimate comparison afterwards. Refs #13

Timeseries databases with a requirement on NoSQL DBMS

• Axibase
• Blueflood
• Databus
• KairosDB
• NewTS
• OpenTSDB
• Rhombus
• Graphite

Timeseries databases with no requirement on any DBMS

• Akumuli
• Druid
• InfluxDB - refs Upgrade InfluxDB to 0.12 #5
• Gnocchi
• Seriesly
• Prometheus

Column-oriented DBMS

• MonetDB
• Kdb+

Relational databases

• MySQL
• PostgreSQL

Other

• Elasticsearch
• h5serv