Add option solarized-scale-org-headlines.

Setting it to t (default nil) prevents setting
solarized-height-plus-4 etc. on org-mode headlines,
but not on other faces.

Add documentation for this.
Merge pull request #138 from andersjohansson/avoid-org-headline-scaling-option

Add option solarized-scale-org-headlines
Add face for column-enforce-mode

Based on the whitespace-line face for highlighting long lines
Merge pull request #139 from alexmurray/master

Add face for column-enforce-mode
removed redundant comma marker
Merge pull request #141 from velimir0xff/scale-org-headlines-load-fix

removed redundant comma marker
Merge remote-tracking branch 'upstream/master'