Consistent Mappings

• Made Mapping API more consistent
  • Renamed prefilter to filter
  • Added filterMap to mappings as their (mostly internally used) designated transform function
  • Removed prefilter argument from map function

Ad Hoc Mapping

• Added Ad Hoc Mapping of observations
• Added filter mapping select for all observables
• Removed filter argument from observe function
• Removed select argument from observe function
• Removed Log (back to SwiftyToolz)