Changelog for lambdabot-5.0.3

lambdabot 5.0.3 * compatibility with ghc-7.10: relax utf8-string upper bound * numerous bugfixes (#121, #122, #123, #117, #98) lambdabot * update Changelog lambdabot * use QuickCheck-safe for @check command * ship ghc version specific Pristen.hs files * the dict plugin no longer looks up more than one word at a time lambdabot 5.0.1 * update to monad-control-1.0 * if ./State/ exists, then state files are stored there even if a corresponding file exists in ~/.lambdabot/State