Add logo png file so we can link it in the readme
Scale logo
Use init script for octoprint and setup.py for installation

Replaces the octoPrintStart script and custom rc.local entry with
a real init script and corresponding entries into rc*.d
Introduced image folder for Raspbian images and local config overrides

Creating a file config.local now allows overriding the build config
without the risk of accidentally committing the changes into the
repository.

THe config script now (unless overridden) determines the image to use
for the build by taking the most recent file matching the wildcard
*-raspbian.zip from the newly introduced image/ subfolder.
Merge branch 'devel' of https://github.com/guysoft/OctoPi into devel
Merge branch 'devel' of https://github.com/guysoft/OctoPi into devel
Forgot action parameter for custom system command
Updated README.rst
Corrected typo in README.rst
Never commit src/config.local
Never commit raspbian images
Fixed a typo in the README
Merge pull request #22 from foosel/initScriptAndEasierLocalConfig

Added init script for OctoPrint and easier way for local build configuration