cleanup and update README

makepkg.conf

@@ -1,10 +1,14 @@
 PACKAGER="Balakrishnan Balasubramanian <arch-pkger@balki.me>"
 
+# Do not build debug packages
+
 for index in "${!OPTIONS[@]}"; do
 	if [[ "${OPTIONS[$index]}" = *debug ]]; then
 		OPTIONS["$index"]="!debug"
 	fi
 done
 
+# Enables all extra features supported by host CPU
+
 CFLAGS="$CFLAGS -march=native -mtune=native"
 CXXFLAGS="$CFLAGS -Wp,-D_GLIBCXX_ASSERTIONS"