config: Made auto-indentation a configurable option
config: Made auto-indentation a configurable option

Fixed issue #32. Makes auto-indentation a configurable option add adds a new
command `\\` that would toggle auto-indentation behavior at run time. This
command would be useful if you'd like to have auto-indentation on by default
but need to disable it before pasting code at the prompt.

lonetwin/pythonrc