rehashing now done by the config file alone - providing the system commands even without pysh typically makes sense.

Changed startup message, and be a bit more conservative with the settings

config changes

renamed rehash_dir.py to ext_rehashdir.py (a convention for naming extensions?), updated Changelog accordingly

%rehashdir mods

%store now prevents storing objs that are in module IPython.FakeModule (interactively declared classes etc.)

Created rehash_dir extensions that introduces new magic, %rehashdir, and also serves as an example on creating extensions for ipython.

_tentative_ fixes to pasting of multiline code with autoindent on. Needs more testing...

Initialize logger earlier (__init__ instead of post-config-initialization)

- Manual updates - Small %edit fix.