update modules concept

modules/sample.ezmod

@@ -1,4 +1,24 @@
 EZMOD_DESCRIPTION="Sample module for learning and testing purposes"
 EZMOD_COMPATIBILITY="ezbuild ezsync"
 EZMOD_AUTHOR="Rafal Kupiec"
-EZMOD_VERSION="0.1"
+EZMOD_VERSION="0.2"
+
+ezsync_presync() {
+	printWarn "This function executes just before refreshing repositories!"
+	return 0
+}
+
+ezsync_postsync() {
+	printWarn "This function executes just after refreshing repositories and just before merging data!"
+	return 0
+}
+
+ezsync_precommit() {
+	printWarn "This function executes just after merging data and just before committing changes!"
+	return 0
+}
+
+ezsync_postcommit() {
+	printWarn "This function executes just after committing changes to remote repositories!"
+	return 0
+}