Bucketstats

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* Try to fix issue by checking if a list
* Try to convert to list before extracting median values
* Adds a file to gitignore
* autopep8
* Updates travis to use nosetests
* More shuffling around. Removed leading underscore so code could be shared
* Restructures import structure
* Fixes some import problems
* Adds \_safe\_getattr
* Adds travis ci

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* Try and fix setup.cfg again

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* changelog

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* Fixes setup.cfg

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* Updates tests
* Updates survival function estimators
* Adds util.py, containing a safe\_divide function
* Adds a test for rcumsum
* Add survival.py

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* Adds some basic distribution functions. Adds \_\_init\_\_.py. Adds test
* Initial commit
* Initial commit