Fix y in motion state and Y in normal state
Use bind-key instead of define-key and global-set-key
Add emacs-refactor
Refactor: move the binding for C-u into conf/operators/prefix-arguments.el
Make C-u in insert state kill back to indentation
Refactor (small)
Don't unset SPC two times
Unbind C-t and C-d in insert state

These are bindings for manually increasing/decreasing indentation. I
almost always use automatic indentation of the major mode.
Disable horizontal scroll bar

Horizontal scroll bar seems to be enabled by default in Emacs 24.4.
Replace three dots with Unicode ellipsis in the modeline
Shorten path to 1/3 of window width instead of 20 characters
Show file's directory instead of default-directory in the modeline