Friendlier default bindings

[polazarus]

Apart from the mouse wheel #50

I think you should map more keys in default, in particular arrows, page up, page down, etc.

[vincent-uden]

I agree. The config file can bind multiple keys to the same actions so it can just be expanded with more bindings.

If you can propose a reasonable set of normal (non-vim) bindings, I'll happily add it to the default config.