Support for readline-like reverse search

[nirbhayc]

Suggestions

• Add support for readline-like reverse search through the history.

$ python
Python 2.7.12 (default, Dec  4 2017, 14:50:18)
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print "foo"
foo
>>> print "bar"
bar
(reverse-i-search)`print': print "bar"

[rohityadavcloud]

@c-bata can you advise? Thanks.

[c-bata]

Good suggestion. I wanna add this feature if go-prompt keeps simple implementation.

[c-bata]

duplicate with #91