no auto_alias in %redashdir import envpersist in sh profile

Make a few igrid attributes private. As igrid displays all attributes it ever encounters, fetch() (which has been renamed to _fetch()) doesn't have to recalculate the display attributes every time a new item is fetched. This should speed up scrolling.

Prefer ibrowse over igrid as the default browser.

Proper fix for tab-completion bug reported by Alex Schmolck; patch by Dan Milstein

Patch by Nik Tautenhahn: Close help window if exiting igrid.

Fix linefeeds.

check if readline is available before calling readline functions in ipy_defaults.py

Fix help file name.

Add help files for igrid.

Add Nik Tautenhahns igrid extension. (igrid is a wxPython-based display object for ipipe.)