Noti
- Added additional mattermost features
- Also changed the internal command to _internal as a tempory hotfix
Mattermost can also be configured through using these environvariable
NOTI_MATTERMOST_USERNAME
NOTI_MATTERMOST_INCOMINGHOOKURI
NOTI_MATTERMOST_CHANNEL
NOTI_MATTERMOST_ICONURL
NOTI_MATTERMOST_TYPE