cleaned up SettingsOperation
cleaned up access/RadixCluster
cleaned up access/PrefixSum
cleaned up access/MergeHashTables
cleaned up access/RadixJoin
cleaned up access/Barrier
Merge pull request #85 from timbokopter/feature/cleanup_RadixJoin

cleaned up access/RadixJoin
Merge pull request #60 from timbokopter/feature/cleanup_SettingsOperation

cleaned up SettingsOperation
Merge pull request #87 from timbokopter/feature/cleanup_Barrier

cleaned up access/Barrier
Merge pull request #83 from timbokopter/feature/cleanup_PrefixSum

cleaned up access/PrefixSum
Merge pull request #84 from timbokopter/feature/cleanup_MergeHashTables

cleaned up access/MergeHashTables
Merge pull request #77 from timbokopter/feature/cleanup_RadixCluster

cleaned up access/RadixCluster