Improve 2018/algmyr/try.sh + update FAQ

The script now does more (another feature of the program).

The FAQ now has a name of 'sox' for FAQ 3.10 which the script refers to
and the README.md file now refers it too (instead of 3.10).

Fix make clobber: rm *.wav.

Update .gitignore.

2018/algmyr/Makefile

@@ -207,7 +207,7 @@ clean:
 
 clobber: clean
 	${RM} -f ${TARGET} ${ALT_TARGET}
-	${RM} -rf *.dSYM
+	${RM} -rf *.dSYM *.wav
 	${RM} -f out.raw
 	@-if [ -e sandwich ]; then \
 	    ${RM} -f sandwich; \