Skip over write attempts of 8192 characters or longer, and don't buffer
output.  [1281]
Add "output truncated" messages, start buffering once we hit a "big
chunk" of output, better way to keep the text pane scrolled to the
bottom as the text updates.
[1281]
Just cleaning up comments [1281]
Merge pull request #27 from mhiley/jython_shell_improvements

First stab at fixing a couple Jython Shell issues: