Updated clustering logic to add 3+ nodes. Added a few more checks to ensure clustering is successful (and fail if not).

Added is_vagrant variable, modified defaults file to modify logic depending on whether running on vagrant.

Added extra flag to control whether InfluxDB should be started on install. Templates use 'influxdb' group when joining cluster, so all influxdb instances that need to be clustered must be part of that group (previously it was using all hosts).

Updated Vagrantfile to use public network (required for clustering). Will break on non-Mac machine though.

updated var names in readme and fixed variable usage instructions

Refactor, and bug fix.

Fixed hardcoded database name in the create demo database task.

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.

Added creation of required directories in case set to non-standard paths. Commented data_engine from configuration until tsm1 stabilizes.