Several bug fixes and minor improvements:
* Added `config.ini` for plugin options
* This forced all files to be on the same root directory, which is a shame. :( Selection procedures and scripts have returned to the top level.
* `filter_and_center.praat` now uses the selection tools, and now maintains original selection
* `rms_normalise.praat` also uses the selection tools, and now has a verbose option
* New procedures on `selection.proc` allow for better control and procedural generation of selection tables
* Minor change in `setup.praat` removes useless button
* Fixed some minor bugs in `view_each.praat`