Better handling of emacsclient, updated

[mwolson]

I've taken @ahyatt's changes from https://github.com/sellout/emacs-color-theme-solarized/pull/17 and have applied them to my branch, with some updates. Full list of changes:

• Remove solarized-degrade (from ahyatt)
• Put nil in 5th column of solarized-colors for base00 and base0 so that they don't change in 8-color mode
• New function solarized-face-for-index (from ahyatt)
• New function solariezd-flip (from ahyatt)
• New function solarized-faces (from ahyatt)
  • Vary color for different terms in face specs only (from ahyatt)
  • Reverse light/dark logic to match upstream
  • Add support for 8-color terms
  • Support solarized-broken-srgb
• solarized-color-definitions: Start with faces from upstream and apply ahyatt's changes:
  • Replace light case with generic URL in documentation
  • Consolidate let-bound lists with let* to reduce indentation
  • Don't let-bind yellow and other colors
  • Use default and cursor faces instead of having separate list of attributes to set them
  • Add bright-bold, opt-under, back
  • Base faces are symbols, not let-bound variables
  • Change ((t (spec))) to just (spec) throughout
• No attempt has been made to support the solarized-contrast high case due to lack of time. Perhaps a 6th column in solarized-colors would be a better approach than rotatef on existing colors.
• No attempt is made to set background-mode; perhaps it is unnecessary since full face definitions are provided

[mwolson]

• New option 'solarized-terminal-themed' controls whether the terminal has been themed with Solarized. In this scenario, we do not set the background color.
• Restore entries in solarized-colors.
• Pass fg and bg colors to solarized-face-for-index and let it use nil if the new option is enabled and we see one of those colors in a foreground/background of face spec.
• If fg and bg are not passed, assume we are making a face for use by a GUI frame.

[mwolson]

• On terminals that are solarized-themed, use unspecified-bg for backgrounds and unspecified-fg for foregrounds. This fixes an issue where the background could stay at a color of a previous theme, instead of going back to the terminal's background color.
• Pass background-mode in variables list. It seems to only have an effect for GUI frames, however.

[mwolson]

Verified that background-mode gets set correctly in theme-specific variables. Haven't seen any problems in a few days of use. The only remaining regression known is lack of support for solarized-contrast high case.

[bradwright]

Wow. :+1:

[mwolson]

Withdrawing this to fixup email address used in commit history and condense change list.