implemented 'ignore compile failures' mode in cythonize() to do trial+error compilation of .py files

Added "--capi-reexport-cincludes" option

Fix error when the first statement of Module/Function/Class is a littera...

that does not end by a new line

Fixed a couple of typos in setup script

Made 'sources' a list of string(s), and also fixed a typo.

avoid unnecessary safety temping of function arguments that are builtins or read-only variables (e.g. extension types)

added dump_pos() method to Node class as a quick debugging way to figure out where a node lives in the source code

make refnanny output easier to detect when used outside of doctests, print number of references leaked