Implemented visibility for private, public, and server only posts
Implemented visibility for private, public, and server only posts

cmput404wi16/metablog-angular,cmput404wi16/metablog-angular,cmput404wi16/metablog-project,cmput404wi16/metablog-angular,cmput404wi16/metablog-angular,cmput404wi16/metablog-project,cmput404wi16/metablog-project