usgin/usgin-cache — pull request #39 by rclark (2013-12-18 00:46:39+00:00)
Title: Feature module improvements

- uses bulk procedure to delete features (fixes #38)
- uses bulk procedure to insert features into the feature cache
- adds a function to look up failed GetFeature requests -- `cache.failedGetFeature(callback);`
- `features.getFeatures` will now always request a new GetFeature doc if the previous request failed.