added livestreamer

updated
Merge pull request #206 from vitorgalvao/add-livestreamer

added livestreamer
Moved constants and appsdb out of main
Exploded some code in the application, mackup and utils modules
Added Code Health Badge
Added a landscape config
Let's not use from ... import
Fixed the version constant in setup.py
Added a needed doctoring in the module
Explicit relative imports
Added docstrings
useless new line
variable name is too short
local var should be lowercase