old_contents: from . import core
  from . import data
  
  from .data import get
  #from .core import year_frac, PerformanceStats, GroupStats, merge
  from .core import *
  
  core.extend_pandas()
  
  __version__ = (0, 2, 1)
  
new_contents: from . import core
  from . import data
  
  from .data import get
  #from .core import year_frac, PerformanceStats, GroupStats, merge
  from .core import *
  
  core.extend_pandas()
  
  __version__ = (0, 2, 2)
  
subject: bump to 0.2.2