exit gracefully for 32-bit hosts (issue #336)

* presents modal dialog warning for 32-bit hosts then exits
* added translation reference to lib/messagebundles/default.po

NOTE:
there are many diffs that are whitespace only - my editor automatically trims trailing whitespaces

maybe here we can show a plain awt dialog loaded via reflection so we dont load anything else unnecessarily as this check would make startup slower for all the compatible machines.