feat(setup-magit.el): Show diff log with commit.

Shows the short diff log alongside the commit message buffer.  Hunks
cannot be separated from that buffer - commit must be aborted and hunks
separated from a standalone diff buffer.
fix(appearance.el): Do no diminish subword

Subword is not a minor mode in latest emacs.  If it shows up in mode
line as (,), update emacs rather than diminishing.
fix(helpers.el): disable vc-rename-file

This wasn't working, and isn't necessary with git.  Ca
fix(setup-yasnippet): remove unused defuns

Removes unused defuns and keybindings from setup yasnippit.  Will add
to this as I get used to current functionality.
feat(new-el-boilerplate): adds checkdoc for new el

This snippet can be called with neb or C-c C-n.  It generates Checkdoc
compliant boilerplate for the new el.
chore(general cleanup): clean several files.

Adds boilerplate, removes whitespace, etc.  No functionality changed.