Merge branch 'release/0.1.6' into develop
+ 0.1.7-1  basic condom-shield and pill graphics and functionality
+ 0.1.7-2  with HIV and start of popup-text steps
+ 0.1.7-3  popup messages and improved playability
Merge branch 'feature/powerups' into develop
+ 0.1.8    powerups and popups
Merge branch 'release/0.1.8' into gh-pages