Update POC details and FAQ.

See merge request !86

facilities.md: Fix MarkDown formatting bugs I introduced

See merge request !85

My apologies; one can see that I mostly work with other formatting
syntax than MarkDown :(

Page about street names

See merge request !81

Update travel.md, minor tweaks for bike travel

See merge request !84

Update travel.md for Rufbus until Sunday

See merge request !83

facilities.md: Update ISDN section with links / clarifications

See merge request !78

facilities.md: Add some general DECT/POC information

See merge request !79

facilities.md: Add minimal section on the GSM/cellular networks

See merge request !80

There have been some question about the supported bands and availability
of SIM cards in the matrix chat, so let's add at least that kind of
basic information.

I'm not a POC member, but just adding general knowledge known from prior
events, which is better than an empty section.

* define who "we" is in the context of the section
* hyperlinks to osmcoom wiki pages for relevant technology
* link to etherpad where interested parties can record their location
* some technical clarifications

remove 4mm for 32a

See merge request !77

Laura main patch 02579

See merge request !74

add power infos from last year and adapt

See merge request !75

add links to other camp web apps

See merge request !72

Make Hub URL absolute, move help and legal notice to quick links, rename parcel to "Getting Stuff there and back"

updating a11y info, adding more links

See merge request !73

hub - clickable urls

See merge request !71