Get TTF/OTF fonts working in IE9+ by setting them to Installable Embedding mode (issue #2517)

Troubleshooting.md

@@ -67,4 +67,45 @@ According to your Font Awesome version, please add to your stylesheets:
 ### ie7-js
 FontAwesome is not compatible with [ie7-js](https://code.google.com/p/ie7-js/).
 
-(more info on [#2171](https://github.com/FortAwesome/Font-Awesome/issues/2821))
+(more info on [#2171](https://github.com/FortAwesome/Font-Awesome/issues/2821))
+
+
+#### Get TTF/OTF fonts working in IE9+
+
+While [some browsers](http://caniuse.com/ttf) support the TTF/OTF formats as webfonts, Internet Explorer generates an error unless the font is set to Installable Embedding mode.
+
+(more info on [#2517](https://github.com/FortAwesome/Font-Awesome/issues/2517))
+
+This can be remedied by setting the ``fsType`` flag in the font file to ``0000``, representing Installable Embedding mode, using one of the following utilities:
+
+##### Using the ttembed-js npm module
+```
+npm install -g ttembed-js
+ttembed-js path/to/fontawesome-webfont.ttf
+ttembed-js path/to/FontAwesome.otf
+```
+or, within node.js:
+```js
+var callback = function(error, oldFsType) {
+    if (error) {
+        console.error('Something went wrong.', error);
+        return;
+    }
+    if (oldFsType === '0000') {
+        console.log('fsType is already 0000; no action taken.');
+    } else {
+        console.log('fsType successfully changed from ' + oldFsType + ' to 0000.');
+    }
+}
+var ttembed = require('ttembed-js');
+ttembed({filename: './path/to/fontawesome-webfont.ttf'}, callback);
+ttembed({filename: './path/to/FontAwesome.otf'}, callback);
+```
+
+##### Using the original ttembed
+```
+git clone https://github.com/hisdeedsaredust/ttembed.git
+cd ttembed
+make
+./ttembed path/to/fontawesome-webfont.ttf path/to/FontAwesome.otf
+```