fixes #2121, #2069 - restrict importers and ENC to puppetmasters and users

CVE-2013-0171: report and fact importers parse YAML directly from the remote
host without authentication. Untrusted YAML can instantiate objects and be
used to exploit Foreman.

CVE-2013-0174: external nodes (ENC) output is available to any source and...

fixes #2129 - only use markdown if redcarpet available

fixes #2069 - use a random salt when saving the root password

CVE-2013-0173: insecure fixed salt "foreman" for passwords

Added auth to smart proxies

Remove mention of tenants from test definitions

Fixes #1880 - Build button (or any with the disabled attribute) shouldn't be clickable

v2 api for configuration_templates and template_combinations

fix xhr authentication issue.

Add Additional Error checking for ldap

I've also got an error key that can be added into Foreman documentation once/if this gets merged.

https://gist.github.com/4506554

fix in compute resources api doc