Stable release.
Changes:
Upon saving markable files, a time-stamped backup file will be created.
Command-line parameter -no_validation can passed to skip validation on start-up.
The default line spacing has been increased.
Attribute panel setting 'Warn on extra attributes' is set to 'False' by default.
When loading a .mmax file, the current file (if any) is pre-selected in the file chooser dialog.
Reduced verbosity of console output.
Some bug fixes:
Issue 2 (pointer-relation rendering of discontiuous markables)
Customized line spacing is retained after style-sheet reapplication