Added hscommon repo as a subtree

hscommon/.tx/config

@@ -0,0 +1,8 @@
+[main]
+host = https://www.transifex.net
+
+[hscommon.hscommon]
+file_filter = locale/<lang>/LC_MESSAGES/hscommon.po
+source_file = locale/hscommon.pot
+source_lang = en
+type = PO