Add better highlighting for show-paren mode

show-paren-mode includes two faces show-paren-match and
show-paren-mismatch.

With this commit, show-paren-mismatch is highlighted with a red
background and black foreground while show-paren-match is highlighted
using uses a dark gray20 background either on the text or throughout
the body depending on whether show-paren-style is parenthesis,
expression or mixed.

Author: ScriptDevil

.gitignore

@@ -0,0 +1,2 @@
+*~
+*.swp

eltbus-theme.el

@@ -133,8 +133,9 @@
    ;; speedbar-selected-face
    ;; speedbar-separator-face
    ;; speedbar-tag-face
-   `(show-paren-match ((t (,@default-color ,@fmt-rev))))
-   `(show-paren-mismatch ((t (,@err-like ,@fmt-rev))))
+   `(show-paren-match ((t (:background "gray10"
+			   ,@fmt-rev))))
+   `(show-paren-mismatch ((t (:background "red" :foreground "black" ,@fmt-rev))))
    ;; widget-field
    ;;widget-single-line
    `(flymake-errline ((t (,@err-like ,@fmt-bld))))