add angular service to prevent too frequent saving
add angular service to prevent too frequent saving

I don't think this will prevent anything malicious, though.

stardust66/math3d,ChristopherChudzicki/math3d,stardust66/math3d,ChristopherChudzicki/math3d,ChristopherChudzicki/math3d,ChristopherChudzicki/math3d,stardust66/math3d,stardust66/math3d