* Wrap connection attempt by try/except block so an individual downed doorbird does not fail the whole platform
* Fixed lint warning
* Disable too-broad-exception pylint warning since the whole point of this is to catch all exceptions and log them while letting processing continue; I don't disable a lint warning lightly, but this is the entire intent of this PR.
* Fixed name of pylint warning to broad-except
* Use _LOGGER.exception to get the stack trace too, per PEP8 recommendation for a bare Exception being caught.
* per @balloob, switch to just catching OSError on a narrow block; I'm not sure this protects all problems with Doorbird device startup, but it protects against the primary one I experience.
* added signalmessenger integration
* allows to send a message (with an attachment) to one or more
recipients
* added signalmessenger documentation to manifest file
* remove debug logging from signalmessenger integration
* add signalmessenger to .coveragerc
* fixed typo in signalmessenger manifes
* moved service specific code to own pypi library
* updated pysignalclirestapi dependeny in manifest.json
* added pysignalclirestapi requirement for signalmessenger component
* fixed typo in codeowners
* reworked signalmessenger integration based on code review input
* updated requirements for signalmessenger
* small code improvements in signalmessenger integration
* no need to use the get() method to access dict parameters that are
required
* small changes in signalmessenger integration
* re-ordered import statements
* removed empty "requirements" list (not needed)
* changed import order in signalmessenger integration according to PEP 8
* used isort to order includes in signalmessenger integration
* renamed signalmessenger to signal_messenger
* renamed signalmessenger to signal_messenger in CODEOWNERS file
* changed documentation url in signal_messenger integration to new name
* changed signal messenger naming in .coveragerc