add dummy adapter
add disabled example to sync.yml template
Add license to gemspec
remove support for Ruby 1.9.2
Merge pull request #159 from ajb/remove-1.9.2

remove support for Ruby 1.9.2
Merge pull request #153 from ajb/null-adapter

Null (dummy) adapter
graceful failure if websocket script is blocked
Merge pull request #160 from ajb/graceful-failure

graceful failure if websocket script is blocked
Update badges
add codeclimate coverage report
Merge pull request #161 from ajb/add-coverage

add codeclimate coverage report
Add Code Climate Travis token