changed jruby readline package name

https://github.com/cldwalker/bond/issues/30

230 tests, 508 assertions, 0 failures, 0 errors

jruby 1.7.6 (1.9.3p392) 2013-10-22 6004147 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_45-b18 [darwin-x86_64]

pry, which is using bond is not throwing any erros anymore