fixed README to conform with installation directory structure

lib/csc/I18N/README

@@ -1,21 +1,27 @@
                    I18N support for Sipwise NGCP CSC
 
-To update the language strings in this directory you'll first need
+1) Regenerate messages.pot if you have modified template files:
+
+To update the language strings in messages.pot you'll first need
 xgettext.pl from the liblocale-maketext-lexicon-perl package.
-   NOTE: 'xgettext' from the gettext package won't work! Don't try to
-         use it here.
+NOTE: 'xgettext' from the gettext package won't work! Don't try to use
+      it here.
+
+Then run
+  xgettext.pl -o I18N/messages.pot root/layout/* root/tt/*
+in the /usr/share/ngcp-www-csc/lib/csc directory. This will update
+messages.pot with all new, changed and removed strings.
 
-Start with running
-  xgettext.pl -o lib/csc/I18N/messages.pot root/layout/* root/tt/*
-in the CSC trunk (or branch) directory. This will update messages.pot
-with all new, changed and removed strings.
+2) Update or create $LANG.po files for translation:
 
-Then change to lib/csc/I18N/ and run
+Change to the I18N directory and run
   msgmerge --update $LANG.po messages.pot
-for all the .po files. (replace $LANG with the language code)
+for all the existing .po files. (replace $LANG with the language code)
+To create a new language, just omit the "--update" option and specify a
+new filename.
 
 Finally edit the .po files and do the translation. Remove old strings
 by deleting the "#~ " quoted lines.
    NOTE: To find strings which require attention, look for empty msgstr
-         entries and for entries marked "fuzzy". Don' forget to remove
+         entries and for entries marked "fuzzy". Don't forget to remove
          the "fuzzy" marks when you're done.