unwrap influxdb-js into src/client/influxdb

[jbilcke]

for the moment we are using a non-versionned, non-published-on-npm version of influxdb-js

since influxdb-js is written in coffee-script, we could unwrap it into a coffee module inside gunfire code:

https://github.com/influxdb/influxdb-js

that would be easier to debug