Added a recursive function to encode all the unicode keys.
Fixing the unicode keys just enconding to utf8.
Deleted unused import collections.
Update version info about IPython 2.0 beta release.
fix loosen and fix requirements, fix sampledata install dir
fix elements example to use new periodic table data format
Homogenize changelog issue capitalization and punctuation.
Merge pull request #410 from lexicalunit/exercise_script

Homogenize changelog issue capitalization and punctuation.
fix #411
Merge branch 'master' of github.com:ContinuumIO/bokeh
Merge pull request #408 from damianavila/fix_shelve

Fix shelve backend server from unicode keys.
update faq
Merge branch 'master' of github.com:ContinuumIO/bokeh
update bokehjs for 0.4.2 release
bump version number for release
Fixed bokeh-server backend shelve py3 incompatibilities.
update changelog
Fixed issues in bokeh server and --backend=memory. Making the minimal changes to make it work OK.
Merge pull request #413 from damianavila/py3_compat

Py3 compat for bokeh server with different backends
make output filenames match