Removed some nicknames; minor grammar fixes

changed instances of "the brave mushroom" in doubles breloom to "Breloom;" changed "the blue bell" in doubles bronzong to "Bronzong," removed an unnecessary comma in doubles bronzong and changed "then" to "than" in doubles cresselia
Merge pull request #91 from smogon/removed-some-nicknames-minor-grammar-fixes-dc4607

Removed some nicknames; minor grammar fixes