Change undo to just be undo.  Undo-tree and the rest should take care
of it.  This should allow modes such as calc-mode to use Ctrl+z for
calc undo.  Also add more keys for redo.  I don't think this is bound
by default for emacs so there is no default key.
Made ergoemacs-cut-line-or-region respect emacs bound commands.
Make previous/next pane shortcut aware.  See Issue #124.
Added more functions that are shortcut aware.
Add more disabled modes to ergoemacs-camel-case toggle
Bug fix for ergoemacs camel case.  Now don't un-camel-case _temp
variables. Also js_book_2011_flanagan is camel-cased and
un-camel-cased appropriately (the _ between book and 2011 is
restored).  Also some speed enhancement.
Add more excluded modes for ergoemacs-toggle-camel-case-chars