code: public static SpannableString typeface(Context context, int strResId, TypefaceCollection collection, int style) {
  		return typeface(context.getString(strResId), collection, style);
  	}
docs: Return spannable string with typeface in certain style
  see: http://stackoverflow.com/questions/8607707/how-to-set-a-custom-font-in-the-actionbar-title
  
  @param context to obtain string resource
  @param strResId string resource id, content
  @param collection TypefaceCollection instance
  @param style    Typeface.NORMAL, Typeface.BOLD, Typeface.ITALIC or Typeface.BOLD_ITALIC
  
  @return SpannableString that can be used in TextView.setText() method