Fixed "The system cannot find the path specified" during Cygwin install

install-cygwin-sshd.bat: Fixed "The system cannot find the path specified." See http://pastie.org/pastes/8585518
install-cygwin-sshd.bat: Renamed ARCH to CYGWIN_ARCH
install-cygwin-sshd.bat: Set CYGWIN_ARCH to x64_64 for 2012 and 2008
install-cygwin-sshd.bat: Removed wget package, as it's not used any more
install-cygwin-sshd.bat: Delete only Cygwin related files in %TEMP%
Added .gitattributes so .bat and .cmd contain CRLFs