Make all match number properties 'num'

This removes the previous mixture of 'number' and 'num' which echoed
the duplicity emitted by SRComp-HTTP. This not only changes all the
places that the backend's objects are used, but also removes any
locally created properties called 'number'. Other properties which
contain 'number' but are qualified (eg: 'current_number') have not
been changed as I doubt they'd cause any confusion.

Change-Id: I99c40f52b570d5d36416c4014265026e50c5524c
Break ternary statement into if before adding functionality.

I'm planning to modify what happens to the live text, which will be
much clearer without changing this structure at the same time.

Change-Id: I19398cfce074f1763110c210d79cf50afaf7cbd1
Support markdown in team descriptions.

In the forums, a team asked about adding formatting, with suggestions
from others about using HTML. Thankfully we already stripped the HTML
out, but it would be nice to offer something. This patch interprets
their input as markdown using the parser we already have available.

Alo remove the wrapping paragraph around the description, since markdown
will also provide one.

Change-Id: I8f5a885ed075d20cc3eb2241d77dcf8fe340cf02
Update AUTHORS with the current contributors
Shrink PNG images using https://tinypng.com/

This makes the images folder smaller by about 2MB (about 65% of the
changed images), which should make the website faster for everyone
while reducing our bandwidth usage.

Change-Id: I39c2e50e33f577cb28b1af2142cd8143d188397f
Automatically jump down to the next question.

Add the id of the current question to its containing div, just before
we update the anchor portion of the url. This results in the browser
moving the viewport down the page to show the new content.

At the moment, the movement is very sudden, so this might need to
be addressed via some form of smooth scroll.

Change-Id: I770f11f769abecdd74182efa57346791279a79a4
Add schematics for the v4 power and servo boards

This replaces the previous generation ones, just as the motor board
schematic did last year. Also restore the links to them from their
respective pages.

Change-Id: I3272b1814e311d5fcdc63d74b30e296d7dac0581