Convert .travis.yml to use "gimme" and update to Go 1.4

.travis.yml

@@ -1,21 +1,19 @@
 language: go
 
-# this should be exactly the same as what's in the Dockerfile
-go: 1.3
+go:
+    - 1.4.1
+    - 1.3.3
 
 # let us have pretty experimental Docker-based Travis workers
 sudo: false
 
 env:
-    - _GOOS=linux _GOARCH=amd64
-    - _GOOS=darwin _GOARCH=amd64
-    - _GOOS=windows _GOARCH=amd64
+    - GIMME_OS=linux GIMME_ARCH=amd64
+    - GIMME_OS=darwin GIMME_ARCH=amd64
+    - GIMME_OS=windows GIMME_ARCH=amd64
 
 install:
     - env | sort
-    - gvm cross "$_GOOS" "$_GOARCH"
-    - export GOOS="$_GOOS" GOARCH="$_GOARCH"
-    - go env
     - go get -d -v ./...
 
 script:

Dockerfile

@@ -1,12 +1,12 @@
 # Dockerfile to cross compile boot2docker-cli
 
-FROM golang:1.3-cross
+FROM golang:1.4-cross
 
 WORKDIR /go/src/github.com/boot2docker/boot2docker-cli
 
 # Download (but not install) dependencies
 RUN go get -v github.com/BurntSushi/toml
-RUN go get -v github.com/ogier/pflag 
+RUN go get -v github.com/ogier/pflag
 
 ADD . /go/src/github.com/boot2docker/boot2docker-cli