merge price, yield #29

# Conflicts:
#	base/src/functions/mod.rs

base/src/test/mod.rs

@@ -20,6 +20,7 @@ mod test_fn_day;
 mod test_fn_duration;
 mod test_fn_exact;
 mod test_fn_financial;
+mod test_fn_financial_bonds;
 mod test_fn_formulatext;
 mod test_fn_if;
 mod test_fn_maxifs;