Dewi-commands

- Major update
- in_directory() context manager
- a product list loader
- module for lutheran lithurgical feasts
- main app: --wait to wait before exiting (useful on Windows)
- main app: --debug / --print-backtrace options
- module_framework: add module support for any command (see README.rst)
* another Config() as dewi_core.config.Config() class
* Messages() class
- dewi_logparsers.logparser: parse logs in a directory + modules (see README.rst)
- dewi.utils.network: MAC to vendor mapping
- dewi.utils.dictionaries: customized behaviour of dicts
- dewi.utils.render.py: add Jinja2 TemplateRenderer
- dewi_commands.common.realtime_sync + filesync (treesync):
sync a directory tree (source code) to a local or remote directory with rules
- dewi.utils.process: find_binary/which to search for executable in PATH
- dewi.utils.kayako_rest: Request + Host classes to communicate with Kayako's REST API
- dewi_core.config.node: Node is a typesafe dict for dewi_core.config module
- dewi_commands.common.images + 4 dewi_commands.commands to sort photos from multiple locations:
* collect-images -> to an SQLite DB
* select-images: select useful entries from collected images
* dedup-images: copy unique images into a new location (original -> new mapping is in DB)
* safe-delete-images: delete images that are copied by dedup-images (if already copied)
- add examples + updated README.rst

- Initial release
- Supports / provide plugins and dewi_commands.commands
- Added edit command, to easily open file with vim at a specific line,
the argument can be copied directly from anything which have similar
output as grep -nH ... | cut -f-2 -d: