Require API key and update help page.

Merge pull request #2 from jkersch/master_pageselection

Merge pull request #1 from jkersch/master

Remove cmdlet for searching Cymon.

Merge branch '2.1'. Add new sources (Simple Email Reputation).

Remove mandatory API secret key

Merge branch 'Add new sources (AlienVault, Censys, Hybrid-Analysis, M…

…alshare, PulseDive, ThreatMiner, VirusTotal).

Fix security protocol issue

Initial release