IGNITE-14706 Provide instructions for build a released module. (#60)


(cherry picked from commit fee830f5ddfc6cbae40c9f7dfb810c1e3c32fa23)
diff --git a/DEVNOTES.txt b/DEVNOTES.txt
index f0d7510..59bdff9 100644
--- a/DEVNOTES.txt
+++ b/DEVNOTES.txt
@@ -5,3 +5,19 @@
 	
 	mvn clean install
 
+
+Maven Build Instructions For Released Apache Ignite Extension
+=============================================================
+
+NOTE: The release sources package of an Apache Ignite extension provides not only released module sources. The sources
+of other modules from the package are development copy and should not be built.
+
+1) Compile and install:
+
+    mvn -pl modules/%MODULE_NAME% clean install
+
+    where the %MODULE_NAME% is a released extension module name.
+
+    Example:
+
+    mvn -pl modules/spring-data-ext clean install