Zz/simple update machine options

[double-z]

• update machine_options when changed
• enable the ability to pass machine_options['transport_options']['options']
• allow for use of strings or symbols
• ensure host parameter is valid ip or resolvable hostname
• bump version to 0.0.8

[tyler-ball]

If you bump up the version, you need to make a point of releasing this change when you merge it to master. Thats why I typically manage the release (changelog and version) separately from any specific PRs, because the changelog has to be updated for all commits since the last release.

[tyler-ball]

ready_machine isn't supposed to call allocate_machine - chef-provisioning takes care of this for you.

[double-z]

• additionally clean up existing ssh machine entry file on delete action
• add timestamp for modified and created times under "location", the former of which is idempotent, the latter immutable
• removed erroneous calls to allocate... they were left over from a registry thing i'm working on that needed it temporarily
• still need to add changelog and proper version flow, will have for full release, RC.1 is needed by Cisco