Fix logic that looks for shift builtins.
Merge pull request #651 from jbrodman/shiftfix

Fix logic that looks for shift builtins.
Support using pointer arithmetic as lvalue
Add unittest.
More stds compliant.  VS doesn't like non constant length local arrays.
Merge pull request #653 from jbrodman/master

Fix for Visual Studio compilation error.
Merge pull request #652 from jbrodman/ptrarithlvalues

Fix a case for a missing lvalue for pointer arithmetic
Windows support
Merge pull request #655 from ifilippov/windows

Windows support in alloy