added range of +/- 1 to get right answer
remove line snapping and grid

added as options :D
edited scaling and changed range to +/- 1.5

Fixed line extending
Various levels are currently broken (work in progress)
fixed bug which broke certain levels
Fixed level soln's

Note level 3,14,18,19 still have problems
Fixed lvl 13, 19 and added border
Fixed checking soln, and removed line extension

Also fixed up level 3, and final
Added rotation animation

started work towards reflection animation
Added flipping animation
code clean up/bug fixes for animations
More animation cleanup
Added solutions, edited animation timings
Reworked animation timings for complex puzzles
Added new erase tool

NOTE: Does not always work for vertical lines (work in progress)
Fixed erase tool

-Also small fix to checking correct answer
-solution added to level 18
the grid is now back
Small changes
Hopefully fixed eraser

Started worked towards double click support
fixed eraser part 2
Merge remote-tracking branch 'origin/develop' into iOS-full-screen-mode