Deactivate tooltip on tab by default.

Codepath is **not** removed by this.
Update some example notebook with Shift-Tab
Remove tooltip on tab logic
Switch default IPython directory back to ~/.ipython

As discussed at the dev meeting, we care more about a consistent default
across platforms than half-heartedly following the XDG specs.
Update tests for IPython.utils.path
Update doc references to .config/ipython
update man page to reflect XDG disrespect :)
remove XDG link
add note to "what's new"
a couple of more stray XDG / .config references
Merge pull request #8 from ivanov/ipython-dir-default

main change is adding a what's new entry
Fix blank space added by included Javascript on page refresh or notebook load
Removed left over log statements
Fix up some problems with parallel docs
Don't document classes defined in if __name__ == '__main__' blocks
Another fix to parallel docs
Remove dead links from whatsnew 0.11 doc
Miscellaneous doc fixes
Fix doc reference
Merge pull request #4480 from takluyver/docs-shotgun-2

Further cleanup of various minor docs things.