Move history and some preferences files to .emacs.d/var

For now ido's file history and multiple-cursor's black/whitelist are
moved.  Previously there were going under $HOME as dotfiles.
New package: `browse-kill-ring'
Whitespace, typo, and indentation fixes

No functional changes.
Drop Solarized theme

I'm happy with Tomorrow theme and never used Solarized since I moved to
Tomorrow.