normalize pydoc indentation

[ArcRiley]

Different Pydoc indentation methods are being used throughout the code, which makes the help() display (and soon website docs) inconsistent. Normalize all the pydoc strings to this format:

cdef class Example :
  '''No Space Before Short Desc, followed by blank line:

    Long description is indented four spaces and wrapped at 80 colums
    and then closing ''' on a line by itself indented to the same level as the opening
  '''
 
  property another :
    '''Another Example

    Still indented four spaces, just as above, because we're in multi-line string.
    '''