disable libardour unit tests that do not function correctly (for windows, at least)
Add --single-tests option to also build each libardour test as a separate program
Add test_search_path function in PBD testsuite
Use test_search_path to find test data in xpath test
Add test_search_path function in libardour testsuite
Use test_search_path function in ardour test
theoretically: "Add new_test_output_dir to common libardour test" but actually features addition of new files, thus losing git history for these two which came from tim mayberry
add new files from test changes by timbyr
Use common test function to create temporary session
Fix portability of test and use temporary test
Remove non-portable and unnused header includes
Revert "Remove non-portable and unnused header includes"

This reverts commit 7ef79d3f4b02e3d2e71d6888fbedd9b3f9c325c7.
NOOP - prevent headaches and remove cruft

Every "point zero one" seconds is only 25 Hz in ardour..
update plugin UIs at reasonable rate (25Hz)
fix compiler warning
change default color of plugin-UI gauge/meter
make config-window suitable for small[er] screens
clean up plugin-ui meter layout
remove *&@?!+%@ question :)

I would like to record, edit and mix,...
..but I don't need software to hold my hand and ask
childish questions if I would like to "open a session".
minor peak-meter performance tweak

* redraw only missing parts of the outside rectangle,
* don't redraw RMS meter if value has not changed