Adds initial support to @detectXSS

Libinject was recently updated to support XSS detection. This commit adds
initial support to it.
Updates the libinjection

Windows compilation was failing due to the utilization of size_t which is part
of the strings.h. strings.h was not part of windows and so the compilation
was failing. This update fix that. Issue #65 on libinjection:
https://github.com/client9/libinjection/issues/65