Merge tag 'v0.5.2' into experimental

Version 0.5.2
Restored experimental info
Added support for exporting reports as AFR
bundle update arachni
bundle update arachni
ScansController#report: Fixed AFR export
bundle update arachni
Bmped version to 0.5.3
Updated Arachni to 1.0.2
Merge branch 'release/v0.5.3'