delete require 'rb-readline' from lib/pry.rb . When use gem rb-readline, require 'readline' not 'rb-readline'.
Add 'public' to description of :M option in ls command.
pass an empty prompt to Readline.readline() from Pry::SimplePager.

fixes #1048.
Merge pull request #1062 from yui-knk/change-require-readline

delete require 'rb-readline' from lib/pry.rb . When use gem rb-readline,...
Merge pull request #1063 from yui-knk/change-ls-option-description

Add 'public' to description of :M option in ls command.
Add 'group should not be changed' to Pry::Command.group .
Merge pull request #1067 from yui-knk/add-comment-on-group

Add 'group should not be changed' to Pry::Command.group .
Remove require 'bond'. Now gem Bond requires 'rb-readline', this undefines Readline constant. When gem 'bond' fix this bug, we will require 'bond' again.
Merge branch 'remove-requiring-bond' of https://github.com/yui-knk/pry into remove-requiring-bond