Initial commit

Already compatible with tag groupings, raw json queries
Added support to time and value groupings and multiple queries
Minor modification of build files
Revert "Minor modification of build files"

This reverts commit ddc46d1253fadb7e4dbc9363446f74869378dc73.
Merge branch 'master' of https://github.com/rdettai/birt-kairosdb-datasource-plugin