Implement a writer for minute data into a format comprised of multiple
ctables, one for each individual asset, with a common 'index' shared by
all ctables where a given a dt maps to the same array index for all
equities and fields.
This format is pulled from the lazy-mainline/Q2.0 branch, with some
changes to the interface.
Add basic retrieval of values at a given dt to reader. Not yet used by
Zipline simulations, but added to support unit tests.
Also, rename stubbed out us_equity_minutes to minute_bars, since the
writer can be agnostic to asset type.
- Generate links to sourcecode via the Sphinx `viewcode` extension.
- Generate reference docs for Asset/Equity/Future, AssetFinder, and
AssetDBWriter.
- Generate reference docs for Pipeline API classes.
- Fix broken links and formatting issues in the 0.8.4 whatsnew.
- Use embedsignature in _assets.pyx so that the signatures of Asset
subclasses are inspectable.
Joe Jevnik