2017-11-20 Hologram <supporthologram.io>
* Added modem is_connected interface. Checks for when a message/SMS can be sent.
* Cleaned up example scripts.
* Fixed misleading 'unable to receive device_id and private_key error'
* Fixed unkilled PPP sessin after specified timeout.
* Fixed misleading error log when users call `hologram activate`
* Updated requirements.txt to point to python-sdk-auth v0.2.0
* Removed TOTP Auth mode option for SMS sends
* Catch NetlinkErorr if setting default route fails
* Add overloaded close_socket interface for R404 listening feature
* Cleaned up redundant scripts within the `examples/` folder
2017-10-24 Hologram <supporthologram.io>
* Added modem is_connected interface. Checks for when a message/SMS can be sent.
* Cleaned up example scripts.
2017-10-23 Hologram <supporthologram.io>
* Added hologram network connect/disconnect CLI commands, deprecating
modem connect/disconnect soon.
* Writes/reads on AT command sockets are now done in hex mode.
* Fix regression where a receive SMS CLI keyboard interrupt will print a
stack trace.
2017-10-20 Hologram <supporthologram.io>
* Sends/receives are done via AT sockets by default instead of a PPP session.