* added pry-doc support for ruby core C methods, (show-doc and
show-method)
* added _ex_ local for recovering last exception
* added -mj option to ls to display methods defined strictly on
singleton class.
* Use clipped version of Pry.view() for large objects
* Exit Pry session on ^d
* Use Shellwords for breaking up parameters to pry commands
* Use OptionParser to parse options for default pry commands
* Add version command
* Refactor 'status' command: add current method info
* Add meth_name_from_binding utility lambda to commands.rb
* Add -M, -m, -v(erbose), -a(ll), -s(uper), -l(ocals), -i(ivars), -k(klass
vars), etc options to ls
* add -M(instance method) options to show-method and show-doc
* add --help option to most commands
* Get rid of ls_method and ls_imethods (subsumed by more powerful ls)
* Get rid of show_idoc and show_imethod
* Add special eval-file command that evals target file in current context
* Made is to 'def meth;end' in an object (not a class) defines singleton methods, not methods on the class.
* Reorganized and reworded some documentation, adding info on rubygems-test
* added rubygems-test support
* added more tests to reflect new method definition behaviour
