bugfixes, minor changes

-Blade Master no longer exhausts and allows you to pick fewer than 2(3) Artes if you wish, to better reflect its intended effect and description.
-Magic Missile no longer keeps the number of times the deck was shuffled when you save and quit then reload.
-Spells/Artes counters adjusted so they always appear at the far left of the powers display, for clarity.
-To better reflect its description, five foot step now actually shuffles the draw pile.
-Spontaneous Caster has a new effect in addition to its old effects: At the end of each turn, Retain all spells.