When a notebook is written to file, name the metadata name u''.
Removed unnecessary regexp part. Added comments about whether using a capturing group is necessary.
Added comment about possibly clearer regexp.
%store -r restores saved aliases and directory history, as well as variables.
notebook supports raw_input and %debug now

updates Frontend-Kernel model example notebook to reflect this.

closes #3489
If template is not found by name, exception thrown.
add 'No Checkpoints' to Revert menu

when there are None, rather than an empty menu.

closes #3261
update CodeMirror component to 3.14

I believe this closes #3361, if @fperez and/or @fonnesbeck can confirm.
make css highlight style configurable
use traitlet for highlight_class
Remove unused imports from IPython.core
Remove unused imports from IPython.config
Remove unused imports in IPython.lib
Remove unused imports in IPython.utils
Remove unused imports in IPython.extensions
Remove unused imports in IPython.html
Remove unused imports in IPython.kernel
Remove unused imports in IPython.qt
Remove unused imports in IPython.terminal
Remove unused imports in IPython.testing