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>

gui/console.cpp

@@ -177,7 +177,7 @@ GUIConsole::GUIConsole(xml_node<>* node) : GUIObject(node)
 		}
 	}
 
-	gr_getFontDetails(mFont, &mFontHeight, NULL);
+	mFontHeight = gr_getMaxFontHeight(mFont ? mFont->GetResource() : NULL);
 	SetActionPos(mRenderX, mRenderY, mRenderW, mRenderH);
 	SetRenderPos(mConsoleX, mConsoleY);
 	return;