Use g_list_free_full/g_slist_free_full
Italian translation updated
usermanual: some build system fixes for translated manuals
Merge pull request #412 from bartokk/master

Italian translation updated
Updated Dutch translation
Merge pull request #413 from MRIG/master

Updated Dutch translation
Fix an overflow of the lua stack

Credits go to boucman for the fix.
usermanual: put each instance of <programlisting> into individual <para> environment

needed to get xml2po working
Cancel export when a store call fails

Lua exporters have to "return true" to cancel the job, "return false" or
no return at all will make it proceed.
Fix - in datetime_taken on migration of the db
Merge pull request #410 from LebedevRI/memory

Use g_list_free_full/g_slist_free_full