Update 12_robotNav.md

New solution "The Sinusoidal droid".
Merge pull request #245 from KamiSempai/patch-1

Update 12_robotNav.md
Update 12_robotNav.md
Update 20_bossFight.md

New solution "air strike".
Merge pull request #248 from filippovdaniil/master

Update 20_bossFight.md
Merge pull request #247 from ont/master

Update 12_robotNav.md
Update 13_robotMaze.md

Added new Solution
Merge pull request #249 from mdunisch/patch-2

Update 13_robotMaze.md
Update 18_superDrEvalBros.md

Make solution more clear (what user can edit)
Merge pull request #250 from mdunisch/patch-1

Update 18_superDrEvalBros.md
fix #254
Merge branch 'master' of github.com:AlexNisnevich/untrusted
fix #246
trying to fix portrait orientation
build