File Output

Added File Output on top of the error priority levels.
A new file is created in Documents/app_name.  If the file is already there we open it and append new data to the end of the file.
The log.txt file is saving the logging data that is printing on the screen.
This feature is useful for debugging apps on the go.  It might be useful for a developer to save the log data in a file so that when they get back to a computer they can go through the log.txt file and see what the passed debugging information is.
The option to save to a text file is included in galgoOptions.

The following permission needs to be added to the android manifest file when using this feature in an app.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />