Restructure: Move fsk from common code to 'libfsk'

src/bnetz/Makefile.am

@@ -21,6 +21,7 @@ bnetz_LDADD = \
 	$(top_builddir)/src/libtimer/libtimer.a \
 	$(top_builddir)/src/libsamplerate/libsamplerate.a \
 	$(top_builddir)/src/libemphasis/libemphasis.a \
+	$(top_builddir)/src/libfsk/libfsk.a \
 	$(top_builddir)/src/libfm/libfm.a \
 	$(top_builddir)/src/libfilter/libfilter.a \
 	$(top_builddir)/src/libwave/libwave.a \

src/bnetz/bnetz.h

@@ -1,5 +1,5 @@
 #include "../libsquelch/squelch.h"
-#include "../common/fsk.h"
+#include "../libfsk/fsk.h"
 #include "../common/sender.h"
 #include "../libtimer/timer.h"