Added SystemV init script to start octoprint

The init script is based on the one provided by the octoprint git repo with
some minor modifications to be compatible to OpenEmbedded. Some arguments
to start-stop-daemon are not supported by busybox and there is no LSB support
in core-image-base. I also added a defaults scripts which contains the link
to ~/.octoprint as basedirectory otherwise octoprint refuses to start.

Signed-off-by: Christian Ege <k4230r6@gmail.com>
Removale of requirements.txt

Otherwise octoprint refuses to start due to not full filled requirements.
Due to the fact that those requirements are hand selected I suppose they
should be okay. I'll have to check this...


Signed-off-by: Christian Ege <k4230r6@gmail.com>
Bumped octoprint version

This forces a clean rebuild.

Signed-off-by: Christian Ege <k4230r6@gmail.com>
Added FFMPEG to the core-image-base

This is needed for octoprint to create a time laps based on mjpeg_streamer.

Signed-off-by: Christian Ege <k4230r6@gmail.com>