No cucumber check means that code can crash other tools

[singram]

If cucumber_characteristics is required but cucumber isn't then for other tools such as rake, the current implementation will crash.

$ rspec NameError: undefined method invoke' for classCucumber::StepMatch' instance_method at org/jruby/RubyModule.java:1961 StepMatch at /home/winograde/.rvm/gems/jruby-1.7.4@cdris_repo/gems/cucumber_characteristics-0.0.1/lib/cucumber_characteristics/cucumber_step_patch.rb:5 Cucumber at /home/winograde/.rvm/gems/jruby-1.7.4@cdris_repo/gems/cucumber_characteristics-0.0.1/lib/cucumber_characteristics/cucumber_step_patch.rb:4 (root) at /home/winograde/.rvm/gems/jruby-1.7.4@cdris_repo/gems/cucumber_characteristics-0.0.1/lib/cucumber_characteristics/cucumber_step_patch.rb:3

[singram]

Fixed in 0.0.2