remove deprecated symmetry option
port twisted's deprecation library
merge master
figure returns plot, most tests and examples pass
Merge branch 'master' into feature/plotting
use types.FunctionType instead of new.function for py3
remove unused views, inherit from HasProperties instead of HasParent
fix typos
fix another typo
remove quotes on identifiers
inherit from Transform base class
add Transform to base.coffee as well
possible subtype impl
make Transform more abstract
py3 fix
Merge pull request #1393 from bokeh/feature/subtype

Possible subtype implementation
Merge branch 'master' into feature/plotting
working Figure subclass of Plot
Merge pull request #1345 from bokeh/feature/plotting

Feature/plotting
fix bad attr width->plot_width