Overdue v0.87 devlog

Haven't done on e of these in a minute, so  here's the new changes with some of the old:

Some R/G colorblind support (player cells and CoV/Flu enemies)

Initial controller support (buttons instructions on options page)

           Added controls submenu to options

New control options (some labels still out of date)

Main menu and restart buttons on options page

Improved touch buttons for all interventions

... and other under the hood changes.

+

Added mask intervention that functions like a pinball blocker/save

       Mask added on month 9 of level 1 - available every 10s - timer starts when mask destroyed - stops 2 pathogens presently

Added difficulty slider to change monthly enemy spawn rate change

Reduced text

Added functioning level locks - press 'u' to unlock all

Added tip label to game over screen

Added tracker system to display number of escaped pathogens - secret  level unlock criteria for later

Adjusted difficulty some