Update POTFILES.in, audacity.pot and .po files.

Also added script add_nyquist_to_pot.sh which adds the nyquist files.

locale/add_nyquist_to_pot.sh

@@ -0,0 +1,18 @@
+for path in ../plug-ins ; do find $path -name \*.ny ; done | \
+sed -r 's/\.\.\///g' |\
+xargs xgettext \
+--default-domain=audacity \
+--directory=.. \
+--keyword=_ --keyword=N_ --keyword=XO --keyword=XXO --keyword=wxPLURAL:1,2 \
+--add-comments=" i18n" \
+--add-location=file  \
+--copyright-holder='Audacity Team' \
+--package-name="audacity" \
+--package-version='2.3.0' \
+--msgid-bugs-address="audacity-translation@lists.sourceforge.net" \
+--add-location=file -L EmacsLisp -j -o audacity.pot 
+
+
+
+
+