update maintainer to be bbinet
update base docker image to be debian:wheezy
force to install a specific version for influxdb
Update root password based on env variable INFLUXDB_ROOT_PASSWORD
Optional: create default db from env INFLUXDB_DEFAULT_DB_NAME
create default db user from INFLUXDB_DEFAULT_DB_USER

and INFLUXDB_DEFAULT_DB_PASSWORD
dockerfile cosmetics
some cleanup in run.sh
fix: give admin rights to default db user
update config.toml to last default version
git rm circle.yml
update readme to follow recent changes