64-bit flisp -- delete long everywhere, use intptr_t instead so that we
can pretend that windows is LP64
(working towards building julia for (native) win64)
some more support for win64 (still incomlete)
fix typo in windows setjmp/longjmp. ensure alloca alignment for setjmp buffer try/catch
Merge pull request #2106 from JuliaLang/jn/win64

support build for (native) win64 -- complete