Explicitly require Sidekiq::ExceptionHandler

Required by changes in Sidekiq 3.0.
Make config.utc actually work

Fixes #76.
Add Travis support for Ruby 2.1.1

Add Travis support for Ruby 2.1.1
Merge pull request #80 from ggilder/ggilder/sidekiq-3-compatibility

Explicitly require Sidekiq::ExceptionHandler
Merge pull request #81 from ggilder/ggilder/fix-config-utc-option

Make config.utc actually work
Merge pull request #82 from auzroz/patch-1

Add Travis support for Ruby 2.1.1
Added disabling and enabling of sidetiq jobs
Added better handling of namespaced workers classes into redis key namespaces
Changed the detection of arguments in perform to using parameters instead of arity, so that if defined by a block, the result will be the same
Added logic to check for argument parameters on perform triggered from web interface