Small fixes for wx-dependent tests and include clearcmd. Check that wx.aui can be imported and otherwise exclude modules that use it to avoid errors when loading the test suite. Also, do load clearcmd so that the tests for %clear do work.

Prevent forced reloading of doctest which was breaking lots of tests. This was the very hard to track source of many test problems. The doctest_reload() function name wasn't changed, but it doesn't actually do reload(doctest) anymore. This is sufficient to clean a large number of test errors in one shot.

Fix problems with side effects and python 2.6. The isolation decorator wasn't working correctly (side effects were leaking into other tests by breaking the user namespace). Rewrote it to instead use a simpler but more robust strategy (that is also faster). See detailed comment in source for more. I discovered that some tests were failing when running with python 2.6 because of changes in the behavior of int and the new print-as-a-function that Wx seems to activate. Updated the code to cope with both 2.5 and 2.6.

Fix https://bugs.launchpad.net/ipython/+bug/362137 We still have two instances of ultraTB.py, which is annoying, but I don't want to touch any more than necessary before 0.10 is out. That will get cleaned up in the ongoing refactoring Brian is working on.

Fixing doctest in excolors that changed because of the new ipstruct.py

Merging upstream changes.

Merging from upstream

Add stdout flushing statements to example. This forces the prints to happen right away, so the example behaves a little more like you'd expect.

Updated iptest to skip inputhook*.py files for doctesting.

Merging upstream from module-reorg.