Remove unused base_packaged.css
Delete schemas Rake task

`./script/generate` doesn't exist so this task can never succeed
Delete routes to admin controller which don't exist

These admin controllers don't exist:

* comments
* general
* trackbacks
DDoS prevention: never to_sym a request params, since it's never garbage collected
My pleasure: guard
Fix vulnerabilities
Drop GroupingController which was only used by TagController
Stay on the blog when redirecting (security fix)
Fix all HIGH security risk from Brakeman analysis
Fill CHANGELOG
Thanks to mvz comments: dup was missing. Remove the comment "never symbolize user given params, symbols are never garbage collected, could lead to an easy DoS"
No need to complexify this block
As indicated by @mvz, it's not needed. Tests ok.
PR#551 feedback: no raise, one line
on /redirect, let Publify redirect outside our blog. Deal with it, Brakeman!
Merge pull request #538 from stevenwilkin/delete-non-existent-admin-controller-routes

Delete routes to admin controller which don't exist
Merge pull request #517 from publify/issue-unused-css

Remove unused base_packaged.css
Merge pull request #536 from stevenwilkin/delete-schemas-rake-task

Delete schemas Rake task
Merge pull request #551 from publify/security_brakeman

Security brakeman