1.5
-fixed yet another softlock in 12 (thanks to nqeron,
 gis4gamer and SliceThePi)
-slightly changed 9 for the people who think it is a good
 idea to place a Piggyback on the blue wool into a spot
 that is completely out of reach without the the Piggyback
-fixed a sequence break in 5 that allowed players who are
 unwilling learners to solve the stage in a way that doesn't
 teach them integral parts of the puzzle mechanics
-removed Herovine

1.4
-IMPORTANT: USE 15W49B OR NEWER FROM NOW ON
-updated particle commands to the new format in 15w49b
-slightly tweaked the "I shot my item out into the void by
 placing a block in it"-protection
-fixed an undiscovered softlock in 12 that is extremely hard
 to pull off and requires you to do something insanely dumb
 and illogical
-fixed a sequence break in level 13 that could open an exit
 to the void (thanks to JamesOfficial96) 

1.3.1
-forgot to place an obsidian block behind the level 7
 softlock fix which allowed you to break the fix with some
 very specific piston placement

1.3
-fixed a really funky softlock in level 7 that probably no
 one else would have found ever (thanks to mrcamoturtle)

1.2
-altered the softlock fix in level 12 so it actually works
 and doesn't make the intended solution more annoying ;)
-fixed an unintended trick in level 5 that could lead to a
 softlock if you follow it up with something extremely
 dumb (thanks to Jack the Reaper)
-disabled the output of a whole lot of command blocks that
 for some reason didn't have it disabled although they were
 NBT-copies of command blocks with disabled output

1.1
-fixed a softlock in level 12 (thanks to qwertyuiopthepie)