Add support for TrueType fonts

* Keeps original font system in place
* Uses the same API as original font system:
   - You can render only one line at a time
   - You can only use one font and color for one gr_text* call
* Caches all rendered text, with a string cache limited to 400
  entries, then it trucates to 250, which results in memory
  usage hovering around 5-10MB

Change-Id: I36107b9dcd8d57bae4486fce8b8f64e49ef3d906
Signed-off-by: Vojtech Bocek <vbocek@gmail.com>
diff --git a/gui/devices/800x480/res/ui.xml b/gui/devices/800x480/res/ui.xml
index 0ee0e94..9acb7a1 100644
--- a/gui/devices/800x480/res/ui.xml
+++ b/gui/devices/800x480/res/ui.xml
@@ -14,7 +14,7 @@
 	</include>
 
 	<resources>
-		<resource name="font" type="font" filename="Roboto-Condensed-16" />
+		<resource name="font" type="font" filename="RobotoCondensed-Regular.ttf" size="16" fallback="Roboto-Condensed-16" />
 		<resource name="base" type="image" filename="background.jpg" />
 		<resource name="main_button" type="image" filename="button" />
 		<resource name="file_icon" type="image" filename="file" />