Merge pull request #73 from tremby/wysihtml5

---

This is tiff/wysihtml5#461 which I wrote last year some
time, rebased on to your fork.

This patch allows the classes set on toolbar buttons to be set in the wysihtml5
configuration, as `classNameCommandDisabled`, `classNameCommandsDisabled`,
`classNameCommandActive`, `classNameActionActive`. I already have disabled and
active classes provided by Twitter Bootstrap and dont want to trawl through
the source files and apply all relevant styles to wysihtml5-specific classes
too -- this is a very nice short cut.

Author: Oliver Pulges

dist/wysihtml5x-toolbar.js

@@ -13478,6 +13478,19 @@ wysihtml5.views.View = Base.extend(
       this._observe();
       if (showOnInit) { this.show(); }
 
+      if (editor.config.classNameCommandDisabled != null) {
+        CLASS_NAME_COMMAND_DISABLED = editor.config.classNameCommandDisabled;
+      }
+      if (editor.config.classNameCommandsDisabled != null) {
+        CLASS_NAME_COMMANDS_DISABLED = editor.config.classNameCommandsDisabled;
+      }
+      if (editor.config.classNameCommandActive != null) {
+        CLASS_NAME_COMMAND_ACTIVE = editor.config.classNameCommandActive;
+      }
+      if (editor.config.classNameActionActive != null) {
+        CLASS_NAME_ACTION_ACTIVE = editor.config.classNameActionActive;
+      }
+
       var speechInputLinks  = this.container.querySelectorAll("[data-wysihtml5-command=insertSpeech]"),
           length            = speechInputLinks.length,
           i                 = 0;

dist/wysihtml5x-toolbar.min.js

@@ -34,6 +34,19 @@
       this._observe();
       if (showOnInit) { this.show(); }
 
+      if (editor.config.classNameCommandDisabled != null) {
+        CLASS_NAME_COMMAND_DISABLED = editor.config.classNameCommandDisabled;
+      }
+      if (editor.config.classNameCommandsDisabled != null) {
+        CLASS_NAME_COMMANDS_DISABLED = editor.config.classNameCommandsDisabled;
+      }
+      if (editor.config.classNameCommandActive != null) {
+        CLASS_NAME_COMMAND_ACTIVE = editor.config.classNameCommandActive;
+      }
+      if (editor.config.classNameActionActive != null) {
+        CLASS_NAME_ACTION_ACTIVE = editor.config.classNameActionActive;
+      }
+
       var speechInputLinks  = this.container.querySelectorAll("[data-wysihtml5-command=insertSpeech]"),
           length            = speechInputLinks.length,
           i                 = 0;