NuMaker ADC read gas sensor (MQ3)

Revision:
9:55b8207e2c6a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.hgignore	Thu Apr 19 09:24:57 2018 +0800
@@ -0,0 +1,7 @@
+# Use Python/Perl regexp
+syntax: regexp
+
+^\.mbed$
+\.build/
+BUILD/
+mbed-os/