Dtale

* bugfix for url display when running from command-line

* charts integration
* the ability to look at data in line, bar, stacked bar & pie charts
* the ability to group & aggregate data within the charts
* direct ipython iframes to correlations & charts pages with pre-selected inputs
* the ability to access instances from code by data id `dtale.get_instance(data_id)`
* view all active data instances `dtale.instances()`

* conversion of new flask instance for each `dtale.show` call to serving all data associated with one parent process under the same flask instance unless otherwise specified by the user (the `force` parameter)

* ipython integration
* ipython output cell adjustment
* column-wise menu support
* browser window popups for: Correlations, Coverage, Describe, Histogram & Instances

* [32](https://github.com/man-group/dtale/issues/32): unpin jsonschema by moving flasgger to `extras_require`

* Correlations Pearson Matrix filters
* "name" display in title tab
* "Heat Map" toggle
* dropped unused "Flask-Caching" requirement