moved the themes to a separate file

Signed-off-by: Donald Curtis <dcurtis@milkbox.net>
explicitly require cl-lib as needed
properly use new cl- functions
Update powerline.el

In powerline-buffer-size:
powerline.el:414:38:Warning: `redraw-modeline' is an obsolete function (as of 24.3); use `force-mode-line-update' instead.
Merge pull request #41 from valchemist/patch-1

obsolete function redraw-modeline -> force-mode-line-update