Remove Travis testing on Go versions below 1.4

Due to Ginkgo incompatibility with lower Go versions

Signed-off-by: Dwayne Schultz <dschultz@pivotal.io>

.travis.yml

@@ -6,13 +6,7 @@ notifications:
 before_install:
 - 'if [[ "${TRAVIS_GO_VERSION}" =~ "1.3" ]]; then go get code.google.com/p/go.tools/cmd/cover code.google.com/p/go.tools/cmd/vet; else go get golang.org/x/tools/cmd/cover golang.org/x/tools/cmd/vet; fi'
 - go get github.com/mattn/goveralls
-- pushd $HOME/gopath
-- mkdir -p src/github.com/onsi
-- cd src/github.com/onsi
-- git clone --branch v1.1.1 https://github.com/onsi/ginkgo/
-- cd ginkgo/ginkgo
-- go install
-- popd
+- go get github.com/onsi/ginkgo/ginkgo
 
 after_success:
 - 'echo "mode: set" > all.coverprofile'
@@ -35,7 +29,6 @@ script:
 - PATH=$HOME/gopath/bin:$PATH ginkgo -r --race --randomizeAllSpecs --failOnPending --skipMeasurements --cover
 
 go:
-- 1.3
 - 1.4
 - tip