Python 3 support

[lmazuel]

Hi again!

Here is the Python 3 support. I have tested it on Ubuntu 14.04 with Python 2.5.6, 2.6.9, 2.7.6, 3.1.5, 3.2.5, 3.3.5 and 3.4.0. On my Ubuntu, I just have to do:

export INLINE_PYTHON_EXECUTABLE=/usr/bin/python3

before calling perl Makefile.PL and all goes fine.

Remarks:

• I tried to update the POD with some useful information but I'm not a POD expert... I think you should check my english and see if it's really useful... Moreover, it might be a good idea to talk about the "INLINE_PYTHON_EXECUTABLE". I don't know...
• Supporting 2.5 and 3.1 in tests at the same time is a nightmare, since:
  • b'...' syntax is not allowed in Python 2.5 at all (not compiling)
  • u'...' syntax is not allowed in Python 3.1 at all (not compiling)

It's why you can see in tests something like:

        # u'föö' is not a valid syntax in Py3.1
        return {'f\xc3\xb6\xc3\xb6'.decode('utf-8'): 'bar'}

• exec has changed between 2 and 3, it's why the test 19 seems a little strange (http://stackoverflow.com/questions/6561482)

If something seems strange or inappropriate, let me know! I will do more commits in this pull request if needed. Hope it helps!

Laurent

[lmazuel]

Hi!

I just want to know if there is something wrong with this pull request, if I can do anything for help. If you think something is not correct or is not handled correctly, do not hesitate to tell it to me, I will take the time to review it and make a new commit. Thanks!

[niner]

Sorry for the delay. I was just busy preparing my talk at the upcoming Austrian Perl Workshop. Since this commit is quite large I wanted to run all tests of our Inline::Python using application before merging. Happy to report that all is well.

I fixed some white space issues (mixing of tabs and spaces) and pushed it to master. I guess it's time for a new release :) Thank you very much for this excellent work!

[lmazuel]

Great news! And thank you :)