Show attribute access and binary operations in default values in autogenerated signatures.
Attribute docstrings support for cdef public attributes.
Changed bint representation in autodoc signatures from 'int' to 'bool'.
Test fixes for autodoc improvements.
Removed the warning about docstrings for private attributes. Fixed erroneous docstring recognition past the blank line.
Merge pull request #216 from nnemkin/autodoc_improvements

Autodoc improvements