Add blank issue template and disable blank issues

There was a link for opening a blank issue, but people miss it and keep asking simple questions using Feature request template.
So add a blank template, so it is easier to find.

Merge pull request #425 from Dasperal/fix_#424

Add missing table for CR_BLACK translation

Merge pull request #425 from Dasperal/fix_#424

Add missing table for CR_BLACK translation

Merge pull request #425 from Dasperal/fix_#424

Add missing table for CR_BLACK translation

Hexen: Implement assembled weapon widget (#399)

* Implement assembled weapon widget

As suggested by @WhiteMagicRaven, thanks!

* Optimized delta calculation

* Even more optimized delta calculation

* Menu item

Fixes #398.

Hexen: Implement assembled weapon widget (#399)

* Implement assembled weapon widget

As suggested by @WhiteMagicRaven, thanks!

* Optimized delta calculation

* Even more optimized delta calculation

* Menu item

Fixes #398.

Hexen: Implement assembled weapon widget (#399)

* Implement assembled weapon widget

As suggested by @WhiteMagicRaven, thanks!

* Optimized delta calculation

* Even more optimized delta calculation

* Menu item

Fixes #398.

Optimize player's breathing calculation (#415)

* Tablify breathing values

Unnecessary, but probably will simplify calculation of player->viewheight.

Probably it is possible to this ramp effect without using LUT at all.

* Even simpler

Optimize player's breathing calculation (#415)

* Tablify breathing values

Unnecessary, but probably will simplify calculation of player->viewheight.

Probably it is possible to this ramp effect without using LUT at all.

* Even simpler

Doom: sync animated textures

See: bradharding/doomretro#747

Thanks @jeffdoggett for the fix!
Thanks @andrikpowell for pointing out. It is unbelievable how such things like random key pickups and teleporters can be created w/o Boom stuff. Absolutely lovely!