Make maintainers read all guidelines

Explanation and reasoning for this PR:

I think it is much better to make new maintainers read the entire guidelines page and not just the naming guidelines. What are these rules and guidelines good for if they get neither read nor respected? Nothing. It also saves a significant amount of time that would otherwise wasted for moderation pointing maintaintainers to meet guidelines for their packages from which they probably are not even aware of their existence.

I also added a moderation note which states moderators should have meticulous knowledge about the guidelines. That should be quite obvious, but it’s always better to explicitly point that out.

I removed the moderation note about being lenient on the package icon guidelines. The guidelines clearly explain how to handle package icons, so why should we not strive for nicer packages and better package quality with more recognizable packages due to icons? If the creators of other software repositoies such as http://download.cnet.com/windows/ are able to distinguish between icons and logos and manage to include the correct icon, then also our maintainers should be able to do it. I see no reason to support the laziness (of probably only the minority) of our maintainers by letting them “pass” with missing or wrong icons. :smiley: Package icons are important and add more value to the package.