Bug#562029: use the standard readline library

[jidanni at jidanni.org]

retitle 562029 Can't search command history with C-r
thanks
>>>>> "TC" == Tzafrir Cohen <tzafrir.cohen at xorcom.com> writes:
TC> Asterisk uses editline rather than readline.
Maybe something like this
http://selfsolved.com/problems/ipython-indents-and-command-history-broken/s/1
is related to the problem of why C-r is broken... but I didn't check further.

CLI vs. AST prompt: for the same cost of three letters, one can tell
which program's CLI is prompting. Like bash$ or sh$ vs. $. But never mind.