Delete imports of exceptions and mimetools.

The modules are not used and they do not exist in python 3.
Document current pycurl exception behavior
Cannot use with statement due to python 2.4
Silence gc test
Merge pull request #55 from p-push/python-3-compat

Python 3 compatibility
Document test matrix
Merge pull request #56 from p-push/test-matrix-docs

Document test matrix
Document requirements in readme
Move ci status to the top
Merge pull request #57 from p-push/readme

Add requirements to readme, move build status to the top
Implement inet_ntop on windows less than vista where it does not exist.

Fixes #50.
Initialize sa_family and zero the remaining members in sockaddrs
Indentation and coding style
Handle bogus address families in our inet_ntop implementation
_WIN32_WINNT < 0x0600, since 0x0600 is Vista
Merge pull request #59 from p-push/inet-ntop-windows

Inet ntop implementation for windows that do not have it (< vista)
Try to fix socket events test not producing a consistent number of events
Try to fix socket test not producing a consistent number of events, not sure why this works though
Fix failing multi test on linux - same as previous commit
Why do these tests set pipelining?