i18n-gen.sh adapted to 2.0
batterie -> battery

Remove unused variables
No whitespace inside parentheses
Add missing whitespace around arithmetic operator
Fix indentation
Remove trailing whitespaces
Use -V (capital V) for version

-v is for verbose.
NEWS: fix typos in v2.0
Merge pull request #354 from dtiersch/i18n-script_2.0

"new" i18n-gen.sh for 2.0