v0.7.1

New Features

• Added the header field to all OBDCommand objects, allowing the user set custom headers on their queires.
• Added voltage check enabled by default, to handle cases where the vehicle is not powered.
• Added lower-power-mode support
• Added new check_voltage and start_low_power options to the OBD constructor.
• Added __repr__ implementation for OBDCommands, containing more information than the normal __str__ function.
• Async connections now support an optional force parameter, like the main OBD API.
• Added delay_cmds argument to the Async connection, used for rate-limiting updates.

Bugfixes

• Handle voltage responses that include a 'v' unit
• Handle "UNABLE TO CONNECT" responses explicitely, rather than blindly continuing

New/Breaking Changes

• Async connections will no longer throw exceptions when the underlying transport is disconnected. They will instead terminate gracefully. Async status is observable via the Async.running parameter.

Internal Changes

• Removed newline from all queries, in favor of a single \r
• Renamed async.py to asynchronous.py to avoid conflict with python's async implementation
• Better debug logging in various error cases
• Better PEP8 compliance