Changes from previous version

As a advised by Frank Westlake on the Android Scripting Google group, dropped the idea of using OI File Manager to select files, replacing it with a Javascript+Python file browser - Javascript does the display part and Python the listing of directories
Setup tab (show configuration) replaces Preview tab Setup tab loads values from the configuration file and displays them. Values can be changed and saved. A "tooltip" appears to explain the meaning of the option when clicking its name
Preview tab becomes part of the file tab
Added the possibility for incompatibility of fields in the CSV compared to text file without crashing. Means that the text may contain 3 merge fields while CSV only two and vice-versa
Added the possibility for incompatibility of fields in the CSV compared to text file without crashing. Means that the text may contain 3 merge fields while CSV only two and vice-versa
Added a version check which compares the current installed version to the configuration file version and decides whether the user needs to re-download some of the user interface components