enable buyapple.py example to run without DISPLAY
sns: WIP
sns: WIP
sns.py: WIP
olmar-bah.py: import from https://www.quantopian.com/algorithms/51697e1b977d7ebb530000ae/51697e3f490e6c067cf9ec8a#algorithm
olmar-bah.py: fixup a bit to work in zipline
olmar-bah.py: another try at emulating quantopian's batch_transform decorator
utils/factory.py: add toy version of data caching
olmar-bah.py: enable caching
utils/factory.py: add toy version of bars caching
zipline/utils/factory.py: caching debugging logs
zipline/examples/olmar-bah.py: store both tickers and sids
zipline/sources/data_source.py: swallow & log mapping data errors