Add much more suppport for doubles and in64 types in the standard library, basically supporting everything for them that are supported for floats and int32s. (The notable exceptions being the approximate rcp() and rsqrt() functions, which don't really have sensible analogs for doubles (or at least not built-in instructions).)
- Call SSE versions for all the various scalar intrinsics
- Fix names of many (all?) AVX intrinsics; all were missing .256 suffix, others had additional issues.
were expecting vector-width-aligned pointers where in point of fact,
there's no guarantee that they would have been in general.
Removed the aligned memory allocation routines from some of the examples;
they're no longer needed.
No perf. difference on Core2/Core i5 CPUs; older CPUs may see some
regressions.
Still need to update the documentation for this change and finish reviewing
alignment issues in Load/Store instructions generated by .cpp files.
