(+) Add HitObjectManagerBase to the SDK for interfacing better with loaded HitObjects.
(*) Get rid of OsuHelper.
(*) Update basic ruleset to support HitObjectManagerBase.
(*) [p] Adjust naming of members of HitObjectManagerBase.
Merge pull request #23 from peppy/Tom94/add_hit_object_manager_base

Tom94/add hit object manager base
(+) Add MapDifficultyRange and AdjustDifficulty for scaling difficulty with taking Mods into account.
(+) Add PreEmpt to HitObjectManagerBase.
Merge pull request #24 from peppy/add_hit_object_manager_base

(+) Add MapDifficultyRange and AdjustDifficulty for scaling difficulty w...
Merge remote-tracking branch 'origin/Tom94/add_hit_object_manager_base'
Merge branch 'master' into no-xna