User blog:QuantumFeint/Tristana rework - inspired by Thok Pwnage

OK, this is short minor rework of tristana, inspired by Thok Pwnage. I am scrub, so feel free to criticize.

Tristana:

Aspd per level decreased from 4% to 3%. (Total aspd decrease of 18% at level 18).

AD tristana changes - minus maximum range(now 635 on lvl 18), weaker aspd steroid @18 with 1 second less duration, +5 magic damage on every attack + 50% bonus ad scaling on ultimate, cooldown on ultimate back to 60.

AP tristana changes - minus maximum range of E and ult, +10% ap scaling on W, -50% AP scaling on R, autoattacks now deal 5(+15% AP) magic damage(E passive).