Fix loading on pre-Emacs 24.

Fixes issue #48 and #49 thanks to @mamciek.

solarized-dark-theme.el

@@ -2,6 +2,4 @@
          (locate-file "solarized-definitions.el" custom-theme-load-path
                       '("c" "")))
 
-(load-into-load-path)
-
 (create-solarized-theme dark)

solarized-definitions.el

@@ -460,9 +460,9 @@ the \"Gen RGB\" column in solarized-definitions.el to improve them further."
        (apply 'custom-theme-set-faces ',theme-name ',theme-faces)
        (provide-theme ',theme-name))))
 
-(defun load-into-load-path ()
-  (when load-file-name
-    (add-to-list 'custom-theme-load-path
-                 (file-name-as-directory (file-name-directory load-file-name)))))
+;;;###autoload
+(when (boundp 'custom-theme-load-path)
+  (add-to-list 'custom-theme-load-path
+               (file-name-as-directory (file-name-directory load-file-name))))
 
 (provide 'solarized-definitions)

solarized-light-theme.el

@@ -2,6 +2,4 @@
          (locate-file "solarized-definitions.el" custom-theme-load-path
                       '("c" "")))
 
-(load-into-load-path)
-
 (create-solarized-theme light)