0.7.5: Blinkstick, SNMP, Telegram

We discovered two issues annoying enough to warrent the release of 0.7.5:

• Home Assistant package did not include the CloudMQTT certificate.
• A bug in the core caused issues when some platforms are loaded twice.

This release also includes some new platforms (because they keep coming!):

• Light: blinkstick platform added (@alanbowman)
• Device Tracker: SNMP platform added (@tomduijf)
• Light: rfxtrx platform added (@badele)
• Switch: rfxtrx platform added (@badele)
• Notify: telegram platform added (@fabaff)

Also, the media player was extended by @maddox to support the play media command. This has been implemented for the iTunes platform.