Create a specific file configuration for each project about twgit

[geoffroy-aubry]

This is already possible with #88.
Example of a .twgit config file stored in a project's root:

#!/usr/bin/env bash

TWGIT_FEATURE_SUBJECT_CONNECTOR='redmine'           # in {'', 'github', 'redmine'}
TWGIT_FEATURE_SUBJECT_CONNECTOR_PATH="$TWGIT_INC_DIR/connectors/feature_subject_%s.sh"  # où %s est un $TWGIT_FEATURE_SUBJECT_CONNECTOR
TWGIT_FEATURE_SUBJECT_REDMINE_API_KEY='xxx' # API key is a 40-byte hexadecimal string.
TWGIT_FEATURE_SUBJECT_REDMINE_DOMAIN='xxx'      # e.g. 'www.redmine.org'

[ltoussaint]

Hum good
Maybe we should add it in the documentation, I didn't find this feature

Also, maybe we should automatically create this file with twgit init?