Use tab for completion and indentation in slime
Use SLIME-FUZZY-COMPLETION with SLIME-AC
Switch compile keybinding from F10 to F9

This matches my change in the Vim keybinding, which was made as I've
heard it's a commonly used keybinding in IDE's
HELM-DESCBINDS - use helm to show active bindings
SMART-TAB - use TAB for both indent and completion

This generally uses TAB for both completion and indentation in all
modes (not relying on the slime specific function).
Hippie completion, M-/ for filenames, else M-\\
Yasnippet completion on the key C-;