BIMP 1.18 (not-a-virus)

DISCLAIMER: the Windows version has been re-uploaded. Some antivirus programs have erroneously started to flag several executables shipped using NSIS 3 (like BIMP 1.18) as malware. This has caused lots of troubles for the users so I decided to downgrade to NSIS 2, that is not affected by this problem.

Anyway, don't worry! BIMP has never been a malware and it will never be ;)

• Windows installer updated to better handle errors (#131)
• ICO and TGA added as image input (#126, #127)
• Added Norwegian translation (thanks to Kolbjørn Stuestøl)
• Updated Spanish (thanks to Damián Blanco) and Russian (thanks to @Skif-off) languages