Italian translation updated
usermanual: minor structural improvement
usermanual: give credits to the translators of this manual
updated Dutch translations usermanual
Merge pull request #733 from MRIG/master

updated Dutch translations usermanual
updated Dutch translations usermanual
Merge pull request #734 from MRIG/master

updated Dutch translations usermanual
OSX packaging: update to GCC-4.8 and OS X 10.10
Merge pull request #730 from bartokk/master

Italian translation updated
OSX packaging: support signing the resulting application bundle