Add a script to help with the release process
Add set -e and simplify versions replacing in NEWS.txt

Thanks to Mineo
Use `set -e` and don't push automatically
PICARD-636: use a better example VA release for tag preview

Use track 2.5 from http://musicbrainz.org/release/4b50c71e-0a07-46ac-82e4-cb85dc0c9bdd as suggested by KRSCuan.
Merge pull request #365 from zas/release_script

Add a script to help with the release process
Merge pull request #366 from zas/PICARD-636

PICARD-636: use a better example VA release for tag preview
Update pot file
Resync translations