Make raw mode the default.

IPython/Extensions/ipipe.py: Added a Table ihist that can be used to browse the IPython input history. IPython/Extensions/ibrowse.py: Added two command to ibrowse: pickinput (mapped to "i") can be used to put the object under the curser in the input line. pickinputattr (mapped to "I") does the same for the attribute under the cursor.

_ip.set_next_input

create app_completes, move non-core completers there, install stock completers as default, ipy_signals in sh profile

crlf cleanup

upd changelog

moved many magics to ipy_legacy.py, moved profiles to Extension from UserConfig, added ipy_profile_none.py for default profile

clean up sh profile banner

Further prefilter refinement -- now aliases, like magics, can get run even if there are python ops on the line after them

exesetup.py: remove tk, wx to avoid bloat