Update NPM dependencies (close #69)

All NPM dependencies were updated to latest except browserify, which caused exceptions. Jasmine and example/server.js still working.

package.json

@@ -25,17 +25,17 @@
 , "main" : "./lib/cucumber"
 , "engines" : { "node" : "0.4 || 0.5 || 0.6" }
 , "dependencies" :
-  { "gherkin" : "2.6.8"
-  , "jasmine-node" : "1.0.13"
-  , "connect" : "1.8.1"
+  { "gherkin" : "2.11.0"
+  , "jasmine-node" : "1.0.26"
+  , "connect" : "2.3.2"
   , "browserify" : "1.8.1"
   , "nopt" : "1.0.10"
-  , "underscore" : "1.2.2"
-  , "rimraf" : "1.0.8"
-  , "mkdirp" : "0.2.1"
+  , "underscore" : "1.3.3"
+  , "rimraf" : "2.0.2"
+  , "mkdirp" : "0.3.3"
   , "cucumber-html": "0.2.0"
-  , "findit": "0.1.1"
-  , "coffee-script": "1.1.2"
+  , "findit": "0.1.2"
+  , "coffee-script": "1.3.3"
   }
 , "scripts" :
   { "test" : "./bin/cucumber.js && jasmine-node spec" }