env_linux: use the most recently built folder
doc/: renamed doxy config files to {web,full}.cfg
doc/: upgrade to latest doxygen
doc/web.cfg: only headers
doc/full.cfg: rename output dir
src/: improve documentation
doc/web.cfg: add examples
src/spectral/: improve documentation
src/mathutils.h: improve doc, fix typo
src/mathutils.c: fix parzen and welch
src/*.h: improve documentation
src/*/*.h: add link to examples, remove trailing spaces, improve documentation
src/io/sndfileio.h: add documentation
src/mathutils.c: fix computation of gauss window
src/musicutils.h: add fvec_set_window
src/pitch/pitch.c: improve documentation
src/spectral/*.h: add link to examples
tests/src/spectral/: improve test examples
tests/src/temporal/: improve test examples
src/tempo: fix example path