Added initial support for annotating struct fields and global variables as being sandbox-private with the name of the sandbox specified as a parameter (e.g. __soaap_sandbox_private("network")). A taint analysis is performed to approximate the propagation of this sensitive data. Finally, a check is made to see a sandbox may access data that it is not supposed to. Currently, this check is limited to sandboxes but next I will do the check for the privileged parent too.