godep: vendor all dependencies & add circle-test.sh

Vendor dependencies and use circle-test.sh to run CI process, because
the CircleCI autobuild operations are not compatible with using godep.

circle.yml

@@ -1,29 +1,8 @@
 dependencies:
-  post:
-    # install rpm & fpm for packaging
-    - which rpmbuild || sudo apt-get install rpm
-    - gem install fpm
-    # install golint
-    - go get github.com/golang/lint/golint
-    # install gox
-    - go get -u -f github.com/mitchellh/gox
+  override:
+    - echo "Dummy override, so no Circle dependencies execute"
 
 test:
-  pre:
-    # install binaries
-    - go install ./...
-    # Go fmt should pass all files
-    - "[ `git ls-files | grep '.go$' | xargs gofmt -l | tee /tmp/foo | wc -l` -eq 0 ] || (cat /tmp/foo; exit 1)"
-    - go vet ./...
-    - "[ `golint . | tee /tmp/foo | wc -l` == 0 ] || (cat /tmp/foo; exit 1)"
-    - "[ `golint testutil/... | tee /tmp/foo | wc -l` == 0 ] || (cat /tmp/foo; exit 1)"
-    - "[ `golint cmd/... | tee /tmp/foo | wc -l` == 0 ] || (cat /tmp/foo; exit 1)"
   override:
-    - make test-short
-  post:
-    # Build linux binaries
-    - gox -os="linux" -arch="386 amd64" ./...
-    - mv telegraf* $CIRCLE_ARTIFACTS
-    # Build .deb and .rpm files
-    - "GOPATH=/home/ubuntu/.go_project ./package.sh `git rev-parse --short HEAD`"
-    - mv telegraf*{deb,rpm} $CIRCLE_ARTIFACTS
+    - bash circle-test.sh
+