Add pixel dilation for certain glyphs, will overlap now instead of having a gap
amend distance_dilate to fields of imagergba
Add distance_dilate property
Grab from glyphspec
fix image to use glyphspec too
remove console.logs
Use obj.references() instead of collecting objects manually
Update test_objects.py after adding tickers and formatters
Merge pull request #430 from ContinuumIO/bbexpose

[WIP] Expose bokehjs objects as backbone objects more consistently
some minor fixes to notebook demos
merge master and fix up
docs for dilate parameter
Expose remaning tickers to python
expose ticker classes in python
Fixed mpl to incorporate changes landed with PR#427.
use false for default value of dilate attribute
Merge pull request #439 from ContinuumIO/feature/dilate

Option to dilate pixel distances on some glyphs
Merge pull request #441 from ContinuumIO/tickerexpose

Expose remaing tickers to python
Merge pull request #442 from damianavila/fix_mpl

Fixed mpl to incorporate changes landed with PR#427.
Add ParameterizedProperty and allow validation in Either