Fix bug in bounded int/float logic.
Added test
Fix infinite loop typo
Fix notify_trait getting called too early.
don't use contains in SelectWidget item_query

gives false positive matches when some values are substrings of others
Check for Python errors in js tests

When running a cell in the js tests,
this checks for any errors and treats them as a failure.

Helps avoid confusion caused by silently ignoring failures in Python code.
Fix icons and typos in ui tour
Use 'is' to compare with None

Issues were detected by PyCharm Community Edition 3.4.
Merge pull request #6481 from jdfreder/intvalidatefix

Fix bug in bounded int/float logic.
Fix button alignment/size
Merge pull request #6640 from jhamrick/ui-tour

Fix icons and typos in ui tour
Make sure DOMWidget _css is set after basic style traits
Updating iopubwatcher.py to query for 'text' instead 'data' in the message dict.
Merge pull request #6642 from JIghtuse/master

Use 'is' to compare with None
Merge pull request #6634 from minrk/select-contains

don't use contains in SelectWidget item_query
Merge pull request #6646 from ngoldbaum/iopubfix

Updating iopubwatcher.py to query for 'text' instead 'data' in the message dict
Merge pull request #6637 from minrk/notice-python-error

Check for Python errors in js tests
Merge pull request #6645 from jdfreder/css_order

Make sure DOMWidget _css is set after basic style traits
Fix conflict with d1305d7510cc3