Update TravisCI to goclean script.

Also update to use the new container-based builds

For now, golint has been disabled since it fails due to wanting
HTTPPostMode.  This change will be made as a part of the upgrade to use
btcjson2 since it involves an API change.

.travis.yml

@@ -1,3 +1,15 @@
 language: go
 go: release
-install: go get -d -t -v ./...
+sudo: false
+before_install:
+  - gotools=golang.org/x/tools
+  - if [ "$TRAVIS_GO_VERSION" = "release" ]; then gotools=code.google.com/p/go.tools; fi
+install:
+  - go get -d -t -v ./...
+  - go get -v $gotools/cmd/cover
+  - go get -v $gotools/cmd/vet
+  - go get -v github.com/bradfitz/goimports
+  - go get -v github.com/golang/lint/golint
+script:
+  - export PATH=$PATH:$HOME/gopath/bin
+  - ./goclean.sh

goclean.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+# The script does automatic checking on a Go package and its sub-packages, including:
+# 1. gofmt         (http://golang.org/cmd/gofmt/)
+# 2. goimports     (https://github.com/bradfitz/goimports)
+# 3. golint        (https://github.com/golang/lint)
+# 4. go vet        (http://golang.org/cmd/vet)
+# 5. test coverage (http://blog.golang.org/cover)
+
+set -e
+
+# Automatic checks
+test -z "$(gofmt -l -w .     | tee /dev/stderr)"
+test -z "$(goimports -l -w . | tee /dev/stderr)"
+#test -z "$(golint .          | tee /dev/stderr)"
+go vet ./...
+env GORACE="halt_on_error=1" go test -v -race ./...
+
+# Run test coverage on each subdirectories and merge the coverage profile.
+
+echo "mode: count" > profile.cov
+
+# Standard go tooling behavior is to ignore dirs with leading underscores.
+for dir in $(find . -maxdepth 10 -not -path './.git*' -not -path '*/_*' -type d);
+do
+if ls $dir/*.go &> /dev/null; then
+  go test -covermode=count -coverprofile=$dir/profile.tmp $dir
+  if [ -f $dir/profile.tmp ]; then
+    cat $dir/profile.tmp | tail -n +2 >> profile.cov
+    rm $dir/profile.tmp
+  fi
+fi
+done
+
+go tool cover -func profile.cov
+
+# To submit the test coverage result to coveralls.io,
+# use goveralls (https://github.com/mattn/goveralls)
+# goveralls -coverprofile=profile.cov -service=travis-ci