- add influxdb_bind_hostname var (defaults to ansible_hostname )
- deal w/ config format changes

Added extra configuration flags for meta/clustering update. Changed default storage engine to tsm in preparation for the 0.10.0 release.

Added option installation URL variable to vars, where InfluxDB will be installed via URL instead of through the package repo.

Variables moved from vars/main.yml to defaults/main.yml.  Role variables that you wish to optionally override in inventory should be in defaults.

Variable names have been namespace to role as to not collide with other roles using similar names.

Templates and tasks have been update to use new variable names.