Support multiple cameras at once #2
Description
Add support for multiple cameras to be managed by the scripts. Currently, the stream_url is hard-coded into take_snapshot.py, and only one camera can be configured. Also, will need to update directory structure for saving snapshots and timelapses to account for multiple cameras instead of just one. The make_timelapse.py script will also need to accept a "camera ID" parameter to tell it for which camera's set of snapshots to generate a timelapse.
Need to consider how output directories will be named. Should some of these be configurable, or should they use sensible names based on the camera IDs provided in the config file? At the very least, timelapse video file names should probably be configurable, or have the camera ID appended to them, even if timelapses end up getting placed in a subdirectory of the timelapses folder for their associated camera.
This should be implemented as either a list of stream URLs or a map of camera names/IDs to stream URLs, specified in the configuration file. Blocked by Issue #1.