Stable release v4.0-r1

Bug Fixes

• Issue #46: Fix default instance change
• Issue #49: Wrong description for tool_opencast | apiconnecttimeout
• Issue #50: Connection test doesnt depend on configured timeout

Improvements

• Issue #47: Refactor settings
• Issue #48: Suggestion: Increase default apitimeout setting and make debugging failed uploads easier
• Pull #55: Timeout improvements
• Pull #51: Update for Moodle 4.0