Typerconf

Makes `Config.read_config` and `Config.write_config` handle already opened file
objects.

**Full Changelog**: https://github.com/dbosk/typerconf/compare/v1.5...v1.6

Refactors package to make internals more useful, eg `Config` class

**Full Changelog**: https://github.com/dbosk/typerconf/compare/v1.4...v1.5

Generalizes the `set` function. Still backwards compatible.

Now the `set` function can take more than just a list. Also, if the value is
`None`, the entry will be deleted, if it exists.

**Full Changelog**: https://github.com/dbosk/typerconf/compare/v1.3...v1.4

Improves dirs creation: use only basename of `sys.argv[0]`.

**Full Changelog**: https://github.com/dbosk/typerconf/compare/v1.2...v1.3

Improves error handling for reading/writing config file.

**Full Changelog**: https://github.com/dbosk/typerconf/compare/v1.1...v1.2

Bugfix: autocompletion callback can't have additional default arguments.

**Full Changelog**: https://github.com/dbosk/typerconf/compare/v1.0...v1.1