added support for all levels

Note: Still need to fix level 7 medium.
fixed level 7
added a number for the fog for level 7
Fix for the star
Fixed level 3 (impossible before)
fixed level 21 and 27 (goal/computer infected at start)
Merge branch 'develop' into feature-addAllLevels
Merged changes, fixed bug where double-digit levels would not display in level end congratulatory message.
Merge pull request #42 from zsweedyk/feature-addAllLevels

added support for all levels