Fix gentoo amd64 template
Remove the obsolete gentoo i386 definition
Rename gentoo templates for consistency
Merge pull request #674 from vaskas/gentoo_fixes

Update gentoo amd64 template
Updated url, iso filename and md5 for Archlinux x86_64 template
Avoid creating files called "null" in %TEMP% -- Windows has a real NUL device.
Merge pull request #676 from juliandunn/use-windows-nul-device

Avoid creating files called "null" in %TEMP%
Merge pull request #675 from InTheBlue/updateArchLinuxISO

Updated url, iso filename and md5 for Archlinux x86_64 template
Merge remote-tracking branch 'upstream/master'