* themes/tsdh-light-theme.el:
* themes/tsdh-dark-theme.el: Make `gnus-button' face inherit from
`button', `gnus-header-name' boxed, and define `rcirc-my-nick'
face.
* etc/themes/dichromacy-theme.el:
* etc/themes/tango-theme.el:
* etc/themes/tango-dark-theme.el:
* etc/themes/wheatgrass-theme.el: Don't define button face separately;
it inherits from link now.
* themes/tango-theme.el, themes/tango-dark-theme.el: Let-bind
tango palette colors. Only define faces for color displays.
Customize the ansi-color-names-vector variable. Add Ediff,
Flyspell, and Semantic faces as suggested by Jan Moringen.
* custom.el: Custom themes no longer use load-path.
(custom-theme-load-path): New option. Change built-in theme
directory to etc/.
(custom-enabled-themes): Add custom-theme-load-path dependency.
(custom-theme--load-path): New function.
(load-theme, custom-available-themes): Use it.
* cus-theme.el (describe-theme-1): Use custom-theme--load-path.
(customize-themes): Link to custom-theme-load-path variable.