blockify v1.7

Mostly small improvements, bug fixes, refactorings and error catching:

• Fixed a segmentation fault in the CLI version.
• Added more logging statements and documentation.
• Added unmute delay option to avoid that pesky last half second you hear on some commercials.
• Switched to a homogenous thread system (no more time.sleep, no more threading.Thread, just proper gtk)

New/Important:

• Implemented a radio_timeout option (see example_blockify.ini for details)
• Configuration syntax changed compared to v1.6 (see the v1.6 example_blockify.ini)