Add email aliases for acting as CNA

Add email aliases for acting as a CNA asas per:
nodejs/security-wg#33

cve-request  - email address that people should be directed to
               in order to ask questions about CVE-related issues.

cve-mitre-contact - private contact points for mitre to reach out
                    directly to in case there are issues that required
                    immediate attention.

cna-discussion-list - email address added ot the CNA email discussion
                      list.  Used for announcements, sharing documents
                      or discussion relevant to CNA community. Rarely
                      has more than 10 messages a week.

PR-URL: #71
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>

iojs.org/aliases.json

@@ -115,5 +115,18 @@
  "gibfahn@gmail.com",
  "hello@bnb.im",
  "rtrott@gmail.com"
+ ] },
+ { "from": "cve-request", "to": [
+ "michael_dawson@ca.ibm.com",
+ "info@bnoordhuis.nl",
+ "vieuxtech@gmail.com",
+ ] },
+ { "from": "cve-mitre-contact", "to": [
+ "michael_dawson@ca.ibm.com",
+ "info@bnoordhuis.nl",
+ "vieuxtech@gmail.com",
+ ] },
+ { "from": "cna-discussion-list", "to": [
+ "michael_dawson@ca.ibm.com"
  ] }
 ]