Create permissions standard

[mike-marcacci]

Permissions are currently handled by the component, and should continue to be. However, we should provide some helper methods/services/directives for handling them. They should use the following format, which will be calculated similarly to how locks currently work:

"permissions": {
    "read": {
        "staff": true,
        "applicant": {
            "open": ["event1"],
            "close": []
        },
        "council": true,
        "reviewer": true
    },
    "write": {
        "staff": true,
        "applicant": {
            "open": ["event1"],
            "close": ["event2"]
        }
    }
}