Hints for mumble in main

Hints

• asv-developer-name-tag-deprecated
  <code>info.mumble.Mumble.appdata.xml:9</code> - <em></em><br/>The toplevel `developer_name` element is deprecated. Please use the `name` element in a `developer` block instead.
• asv-description-first-para-too-short
  <code>info.mumble.Mumble.appdata.xml:11</code> - <em>Open source, low-latency, high quality voice chat.</em><br/>The first `description/p` paragraph of this component might be too short (&lt; 80 characters). Please consider starting with a longer paragraph to improve how the description looks like in software centers and to provide more detailed information on this component immediately in the first paragraph.
• asv-developer-info-missing
  <code>info.mumble.Mumble.appdata.xml</code> - <em></em><br/>This component contains no `developer` element with information about its author.