Scrapinghub

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- `python-hubstorage`_ merged into python-scrapinghub
- all tests are improved and rewritten with py.test
- hubstorage tests use vcrpy cassettes, work faster and don't require any external services to run

`python-hubstorage`_ is going to be considered deprecated,
its next version will contain a deprecation warning and a proposal
to use python-scrapinghub >=1.9.0 instead.

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- python 3 support & unittests
- add retries on httplib.HTTPException
- update scrapinghub api endpoint

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- basic py3.3 compatibility while keeping py2.7 compatibility
- update setup.py classifiers

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- fix travis workaround deploying on tags

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- packaging improvements
- cleaner implementation of project.job()

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- support retreiving a fixed amount of items