refactoring for swerve

--HG--
rename : braid/synth/serotonin.maxpat => braid/synth/serotonin/serotonin.maxpat
rename : braid/synth/serotonin_voice.maxpat => braid/synth/serotonin/serotonin_voice.maxpat
rename : braid/synth/cynth.maxpat => braid/synth/swerve/cynth4.maxpat
rename : braid/synth/pan4.maxpat => braid/synth/swerve/pan4.maxpat
rename : braid/synth/swerve.maxpat => braid/synth/swerve/swerve.maxpat
rename : braid/synth/swerve.maxpat => braid/synth/swerve/swerve4.maxpat
organizing examples and pieces

--HG--
rename : braid/synth/swerve/cynth4.maxpat => braid/synth/swerve/cynth.maxpat
rename : examples/test.py => examples/test_basic.py
rename : examples/test_blend.py => examples/test_crosspattern.py
rename : examples/test_adsr.py => examples/test_serotonin_adsr.py
rename : examples/midterm.py => pieces/2230_debut.py
rename : examples/final.py => pieces/MMW_1.py