feat(user): Report profiles

This adds a simple email-based mechanism to report profiles for
abuse. An email with text from the report is sent to Free Code
Camp's support account with the reporter's account in copy. This
also adds the reporter's details to the report for follow ups.

server/middlewares/validator.js

@@ -26,6 +26,30 @@ export default function() {
           // every file has contents
           keys.map(key => value[key]).every(file => isPoly(file));
       }
+    },
+    customSanitizers: {
+      // Refer : http://stackoverflow.com/a/430240/1932901
+      trimTags(value) {
+       const tagBody = '(?:[^"\'>]|"[^"]*"|\'[^\']*\')*';
+       const tagOrComment = new RegExp(
+           '<(?:'
+           // Comment body.
+           + '!--(?:(?:-*[^->])*--+|-?)'
+           // Special "raw text" elements whose content should be elided.
+           + '|script\\b' + tagBody + '>[\\s\\S]*?</script\\s*'
+           + '|style\\b' + tagBody + '>[\\s\\S]*?</style\\s*'
+           // Regular name
+           + '|/?[a-z]'
+           + tagBody
+           + ')>',
+           'gi');
+         let rawValue;
+         do {
+           rawValue = value;
+           value = value.replace(tagOrComment, '');
+         } while (value !== rawValue);
+         return value.replace(/</g, '&lt;');
+      }
     }
   });
 }