Gitonic

- fix: blank in path will show file as deleted

- fix: blank in path will show file as deleted
- fix: rename file with git
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- improved formatter
- support for multiple file extension for single config entry
- support for path expansion for formatter config
- added sample for uncrustify (c, c++)
- on "changes" tab
- added context menu to open file system explorer
- added support for custom context menu with `~/.gitonic/context.json`
- calling merge-tool with more then more file selected on change tab will
not block the user-interface anymore since starting independent from main process
- **important** add `--newtab` to `meld` configuration in `.gitconfig`
to re-use an already running instance of `meld`
- context menu handler expands user path (`~`)
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- show all untracked files on changes tab (not only the folder)
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- support for more code formatters (included in standard installation as extras)
- install with `pip install gitonic[PEP08]`
- pycodestyle
- autopep8
- black
- yapf
- support for meld (included in standard installation as extra)
- install with `pip install gitonic[MELD]`
- installation script (linux) for using within a virtual environment
- added more installation options
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- fixed logging
- fix no branch crash when no branch is set up
- added fetch buttons
- double ESC will exit gitonic
- new hotkey Alt-c to go directly to commit tab
- added F5, F6 hotkeys for changing the active tabs
- custom formatter support
- defined under settings `formatter.json`
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