add MinGW-w64-update script
add --disable-nls to gdb and binutils for performance reasons
fix mingw-w64 update package script
clean up patch files
fix mingw-w64 update package script
add x64 GCC 4.8 libgcc dll to be moved to toplevel bin
GCC 4.8 and MinGW-w64 trunk changes, along with package versions and things to build
set versions for 4.8 prerelease
update mingw-w64-update script
get changes for GCC 4.8 and optimizations
set 4.7.3 release version
merge from master and set 4.7.3 release version