Set use_html_safe => true with slim engine, (now real use safebuffer system)
Merge pull request #1117 from WaYdotNET/slim-safebuffer

Slim now use safebuffer
fixed uninstall function in Rakefile to make :fresh/:uninstall tasks run without errors.
Merge pull request #1118 from lenzcom/master

fixed uninstall function in Rakefile to make :fresh/:uninstall tasks run without errors.
Merge remote-tracking branch 'upstream/master' into super-admin

* upstream/master:
  fixed uninstall function in Rakefile to make :fresh/:uninstall tasks run without errors.
  Set use_html_safe => true with slim engine, (now real use safebuffer system)