Prevent !cmd to try to run backgrounded (cmd &) processes.

Fix svg rich backend to correctly show multiple figures.

Ensure that an absolute path is encoded in %edit payload.

Removed ANSI coloring for kernel exception hook.

Added comment explaining why the behavior of Ctrl-L cannot be improved, after trying and failing to do so.

Pressing Ctrl-K at the end of a line now deletes the newline, as expected.

Update message spec with details about attribute, prompts, etc. From discussions over the past few days with Brian and Evan.

Made IPythonWidget and its subclasses Configurable.

Replaced internal storage object with namedtuple.

Improved the size hint for ConsoleWidget. We now acheive a width of 80 characters, through a mixture of better margin calculation and, well, fudging a little bit.