Local repl-config.el for user-specific customization

[gaya-]

For roslisp_repl users there is no way to change their Emacs setup without editing the installed code. Although roslisp_repl is not supposed to be customized (for that one should properly setup their Emacs init file) it would still be nice to have a repl-config-local.el in the user's home to allow for little customizations. If the file does not exist, roslisp_repl would create it from repl-config-local-default.el and use the new file, if repl-config-local.elgets broken and creates problems when loading roslisp_repl will fall back to repl-config-local-default.el and issue a big fat warning.

[vishal3011]

Can I work on this?

[gaya-]

@vishal3011 Sure, it's an open-source project, so if you contribute a pull request to solve the issue all the users of these packages will be grateful.