Cut rake out of rspec/cucumber for CI builds.

When something environmental fails (i.e. not in an individual spec, but when the spec files are being loaded), the rake tasks craps out but does not include the backtrace of what failed.  It's really annoying and hard to troubleshoot.  This should work better.

.travis.yml

@@ -1,7 +1,7 @@
 language: ruby
 env: CUCUMBER_FORMAT=progress
 bundler_args: --without extras
-script: "bundle exec rake ci:build --trace"
+script: "script/ci.sh"
 rvm:
   - 1.8.7
   - 1.9.2

script/ci.sh

@@ -0,0 +1,14 @@
+# Kill the whole script on error
+set -e
+
+# Setup vendored rspec-1
+git submodule init
+git submodule update
+
+bundle exec ruby -w -I./spec -r./spec/capture_warnings -rspec_helper -S rspec spec --format progress --backtrace
+
+bundle exec cucumber
+
+bundle exec rake yard_coverage
+
+bundle exec rake check_code_coverage