Add description related to truststore merger.

Issue-ID: DCAEGEN2-2253

Signed-off-by: Jan Malkiewicz <jan.malkiewicz@nokia.com>
Change-Id: I6f244766a7d8480385257fa45a006f416a0aa8e9
diff --git a/.gitignore b/.gitignore
index d72f213..3bbd496 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
 docs/.DS_Store
 *.DS_Store
 site
+
+# IDEA intellij project files
+.idea/
+*.iml