Add a lot more of transparency to the wiki and website

[Fohlen]

From my perspective we should add more transparent information about Inexor, so that users and developers can easily understand:

• what is beeing worked on
• who works on what
• what will (or does) it bring for the end user
• how to set things up
• where can we help

I was thinking to add a series of blog posts to the new website, telling about these things. Currently the wiki is really messed up, and I often get the feedback that it is impossible to understand what is Inexor, and why they should support us. #381 is also part of this.

[Fohlen]

There's lately been a lot of progress in the org to improve on this, and lastly #405. As it's been noted in many discussions, we now use GitHub Projects and the central wiki so effectively, that I am ditching this issue.