GNU Solfege 3.22.2 / 3.23.0 Unstable

Updated Esperanto, Portugese and Turkish translations to the users manual
Updated Spannish and Turkish messages
distribute solfege/tests/lesson-files/*
help/C/scales/modes.html are never translated. So we must link to the C-locale file in every translation.
gettext tweaks to make the test suite work both when run as "test.py" and "test.py test_lessonfile". There is still something wrong because we have to disable the test to run debuild
distribute solfege/tests/lib/* and solfege/test/include/*

Documentation:
· the intervals lesson file variable was documented wrongly.
· 140% line-height in the generated user manual
· the elembuilder module changed how it stored its statistics. So all elembuilder statistics will be lost. We will save a backup of the statistics database the first time 3.21.2 is run.
· gu.FlashBar: display extra strings (set by kwargs) in the same font as the rest of the string.
· Put a deprecation notice in the chord modules gui.

Improvements:
· interval exercises: added larger intervals, up to double octave
· elembuilder: make the answer buttons insensitive when the user is not supposed to click on them.
· added the header.statistics_matrices lesson file variable
· mpd: try to avoid crashing noteheads when displaying two noteheads at the same step, but with different accidentals.
· the statistics page for each exercise now have a button that let us delete the statistics for the exercise.
· The --debug option will also show the module name as a tooltip for the link button that starts the exercise.
· Make the "Guess answer" button be sensitive only when the user have entered an answer.
· Statistics viewer: added a row to the percentages table showing count and percentage correct for all questions asked in the session, day, week and all-time.
· The frontpage will show the filename if the app is started with the --debug command line option.
· idtone exercise: show statistics when the user configure the module himself. And remember the config.
· We can now place exercise modules written in Python in ~/.solfege/exercises/dirname/modules/

New modules:
· added the toneincontext exercise module
· added solmisation exercise module. Thanks to Jan Baumgart and Folkwang Universitaet der Kuenste

Build fixes:
· version_info build fix
· test.py: move some code so that running a subset of tests also will create and remove tmp directory
· make dist: include the files in exercises/regression-lesson-files/share/
· build fix to avoid problem with too long list of files
· add INSTALLDIR/exercises/standard/lesson-files to the include() functions search path

Bug fixes:
· elembuilder: fix the backspace accel
· fix bug #237
· rhythmtapping and rhythmtapping2: rest handling bugfix
· HarmonicProgressionLabel: set_alignment bugfix.
· compareintervals: fix "Repeat first" and "Repeat last" sensitivity
· SolfegeApp: don't sync the statistics database until the last exercise is shut down.

Lesson file writing:
· added import and rimport statement
· remove all support for file formats that depent on lesson_id. Did not remove the lesson_id variable from lesson files since this would reset the statistics.
· dataparser will parse to a parsetree that we interpret.
· lesson file modules: tmp hack to let different lesson file modules have different default values to variables.