Add solarized-termcolors support

solarized-termcolors allows the user to override the number of
display cells used. The default value for solarized-termcolors
is nil, which will use the value of dispay-color-cellThe
default for non supported number of color cells is the 16 color palette.
Merge branch 'master' of github.com:mrtipper/emacs-color-theme-solarized