improve developer documentation
beautify data readme and fix link
improve developer readme
minor improvement
another minor
log-det notebook updated to take less build-time
Updated HashedDocDotFeatures notebook
Merge pull request #1717 from van51/develop

Updated HashedDocDotFeatures notebook
Merge pull request #1716 from lambday/develop

log-det notebook updated to take less build-time
Fixed notebook error upon conversion
Merge pull request #1718 from van51/develop

Fixed notebook error upon conversion
workaround ipython crash for this notebook
FGM notebook update: using subset of training data
Merge pull request #1719 from hushell/develop

FGM notebook update: using subset of training data
ensure that binary labels are in -1/+1 - but if they don't contain +1 or
-1 just warn the user instead of throwing exceptions (Fixes #1711)