add functionalily to write equal sign

Hi, i've updated 2 files (index.html and simplelines.js). I've added "if (e.ctrlKey) brush = BRUSHDOUBLE;" to line after "if (e.altKey) brush = BRUSHERASE;" and changed 'if' statements at simplelines.js from 29 to 32 lines at file. 

I think files contained trailing whitespaces and sublime text cutted them off and it's a reason of 17 additions and 14 deletions.