Store more app meta-information

Created by: mray

I have no idea what information about apps is stored where or how, so many things are already done I guess. But here is just what I imagine to be sensible meta-information that should come with each app/module:

• name (max ~20chars)
• version number
• app-page link
• category (free text max ~40chars)
• short description (max ~80chars)
• long description (max ~300chars)
• logo image (min ~128x128px)
• screenshots (max ~3)
• support for single sign-on (SSO)
• running status (on/off)
• updating status (is it being upgraded?)
• notification status (are there any issues?)
• list of ports that need to be forwarded
• link to end user documentation (help)
• link to the upstream homepage project
• link to the upstream source repository
• link to the upstream issue tracker
• license
• titled links to third party/related projects (e.g compatible client software) Some kind of mandatory test to detect missing info seems sensible to me.