fix upstream embind tests
jshint
some minor fixes that got in the way of debugging a separate issue
IE11 compatibility
Merge pull request #2989 from chadaustin/embind-updates

Embind updates
Support running emscripten.py on Cygwin Python / Windows Node with relative paths.

Conflicts:

	emscripten.py
Remove cwd arguments as they don't work in the n* environment.
Add support for relative paths on Cygwin/mingw again (win32 nodejs, cygwin python don't mix)

Conflicts:

	emscripten.py
command lines are too long on windows
disable registerize: closure does a better job
avoid the need for replacing backslashes with slashes on windows for some settings
Temporary libcxx changes.
[tracing] Temporary changes to trace function allocations.