Fix pixmap usage in pictureloader

fix #1765

new description (match io page)

match new description wording from io page

Misc speedups in card database

reworked parts of readme

Oracle: follow redirects

mtgjson now secure

fix replay progress bar

Remove 'syntax = proto2' from .proto files.

- added small 'new user guide' at top
- reworked 'downloads' part
- changed layout of 'translation' part
- removed server list in favor of gh pages link (server list can be found there)
- switched to https everywhere (zlib not supported yet --> added hint)

That marker is only recognized by pb3-compatible compilers, meaning that
tools which are otherwise compatible with our files break on them.
Notably, this includes hprotoc (for haskell).

Updated ToC with 'Downloads'

Token coordinates

Token PT shown in create related dialog

Enable HiDpiPixmaps for Qt5

Implement reverse-related tag for cards

Coin Flips

remove male/female as it's same

male/female fixes

translate

Fix win32 package creation

Split PictureLoader out of CardDatabase

Possibly fix server crash #1716

Possible fix for server crash

Add gear icon to settings menu entry