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+Contributions to the project are always welcome!
+Though there is no strict rule on how to contribute, following points will help to merge your changes smoothly.
+(Some of them are quote from Linux patch submit guide. :)
+
+CODE
+----
+- Separate commits so that each comit has single purpose: it is good to separate "bug fix", "new feature" and "spelling fix".
+- The preferred limit on the length of a single line is 80 columns.
+
+COMMIT MESSAGE
+--------------
+- Write short description in the first line with format "CHANGE_TARGET: SHORT_CHANGE_DESCRIPTION",
+  e.g. "BLESession: Support multiple Bluetooth adapters" or "BLESession.matches: Support namePrefix
+  in matching filters".
+- Describe your changes in imperative mood, e.g. "make xyzzy do frotz"
+  instead of "[This patch] makes xyzzy do frotz" or "[I] changed xyzzy
+  to do frotz", as if you are giving orders to the codebase to change
+  its behaviour.