Use Go 1.5 vendoring instead of Godeps

Change made by:

- running "gvt fetch" on each of the packages mentioned in
  Godeps/Godeps.json
- `rm -rf Godeps`
- tweaking the build scripts to not mention Godeps
- tweaking the build scripts to test `./lib/...`, `./cmd/...` explicitly
  (to avoid testing vendor)
- tweaking the build scripts to not juggle GOPATH for Godeps and instead
  set GO15VENDOREXPERIMENT.

This also results in some updated packages at the same time I bet.

Building with Go 1.3 and 1.4 still *works* but won't use our vendored
dependencies - the user needs to have the actual packages in their
GOPATH then, which they'll get with a normal "go get". Building with Go
1.6+ will get our vendored dependencies by default even when not using
our build script, which is nice.

By doing this we gain some freedom in that we can pick and choose
manually what to include in vendor, as it's not based on just dependency
analysis of our own code. This is also a risk as we might pick up
dependencies we are unaware of, as the build may work locally with those
packages present in GOPATH. On the other hand the build server will
detect this as it has no packages in it's GOPATH beyond what is included
in the repo.

Recommended tool to manage dependencies is github.com/FiloSottile/gvt.

vendor/github.com/onsi/ginkgo/internal/codelocation/code_location.go

@@ -0,0 +1,32 @@
+package codelocation
+
+import (
+	"regexp"
+	"runtime"
+	"runtime/debug"
+	"strings"
+
+	"github.com/onsi/ginkgo/types"
+)
+
+func New(skip int) types.CodeLocation {
+	_, file, line, _ := runtime.Caller(skip + 1)
+	stackTrace := PruneStack(string(debug.Stack()), skip)
+	return types.CodeLocation{FileName: file, LineNumber: line, FullStackTrace: stackTrace}
+}
+
+func PruneStack(fullStackTrace string, skip int) string {
+	stack := strings.Split(fullStackTrace, "\n")
+	if len(stack) > 2*(skip+1) {
+		stack = stack[2*(skip+1):]
+	}
+	prunedStack := []string{}
+	re := regexp.MustCompile(`\/ginkgo\/|\/pkg\/testing\/|\/pkg\/runtime\/`)
+	for i := 0; i < len(stack)/2; i++ {
+		if !re.Match([]byte(stack[i*2])) {
+			prunedStack = append(prunedStack, stack[i*2])
+			prunedStack = append(prunedStack, stack[i*2+1])
+		}
+	}
+	return strings.Join(prunedStack, "\n")
+}

vendor/github.com/onsi/ginkgo/internal/codelocation/code_location_suite_test.go

@@ -0,0 +1,13 @@
+package codelocation_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"testing"
+)
+
+func TestCodelocation(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "CodeLocation Suite")
+}

vendor/github.com/onsi/ginkgo/internal/codelocation/code_location_test.go

@@ -0,0 +1,79 @@
+package codelocation_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	"github.com/onsi/ginkgo/internal/codelocation"
+	"github.com/onsi/ginkgo/types"
+	. "github.com/onsi/gomega"
+	"runtime"
+)
+
+var _ = Describe("CodeLocation", func() {
+	var (
+		codeLocation       types.CodeLocation
+		expectedFileName   string
+		expectedLineNumber int
+	)
+
+	caller0 := func() {
+		codeLocation = codelocation.New(1)
+	}
+
+	caller1 := func() {
+		_, expectedFileName, expectedLineNumber, _ = runtime.Caller(0)
+		expectedLineNumber += 2
+		caller0()
+	}
+
+	BeforeEach(func() {
+		caller1()
+	})
+
+	It("should use the passed in skip parameter to pick out the correct file & line number", func() {
+		Ω(codeLocation.FileName).Should(Equal(expectedFileName))
+		Ω(codeLocation.LineNumber).Should(Equal(expectedLineNumber))
+	})
+
+	Describe("stringer behavior", func() {
+		It("should stringify nicely", func() {
+			Ω(codeLocation.String()).Should(ContainSubstring("code_location_test.go:%d", expectedLineNumber))
+		})
+	})
+
+	//There's no better way than to test this private method as it
+	//goes out of its way to prune out ginkgo related code in the stack trace
+	Describe("PruneStack", func() {
+		It("should remove any references to ginkgo and pkg/testing and pkg/runtime", func() {
+			input := `/Skip/me
+Skip: skip()
+/Skip/me
+Skip: skip()
+/Users/whoever/gospace/src/github.com/onsi/ginkgo/whatever.go:10 (0x12314)
+Something: Func()
+/Users/whoever/gospace/src/github.com/onsi/ginkgo/whatever_else.go:10 (0x12314)
+SomethingInternalToGinkgo: Func()
+/usr/goroot/pkg/strings/oops.go:10 (0x12341)
+Oops: BlowUp()
+/Users/whoever/gospace/src/mycode/code.go:10 (0x12341)
+MyCode: Func()
+/Users/whoever/gospace/src/mycode/code_test.go:10 (0x12341)
+MyCodeTest: Func()
+/Users/whoever/gospace/src/mycode/code_suite_test.go:12 (0x37f08)
+TestFoo: RunSpecs(t, "Foo Suite")
+/usr/goroot/pkg/testing/testing.go:12 (0x37f08)
+TestingT: Blah()
+/usr/goroot/pkg/runtime/runtime.go:12 (0x37f08)
+Something: Func()
+`
+			prunedStack := codelocation.PruneStack(input, 1)
+			Ω(prunedStack).Should(Equal(`/usr/goroot/pkg/strings/oops.go:10 (0x12341)
+Oops: BlowUp()
+/Users/whoever/gospace/src/mycode/code.go:10 (0x12341)
+MyCode: Func()
+/Users/whoever/gospace/src/mycode/code_test.go:10 (0x12341)
+MyCodeTest: Func()
+/Users/whoever/gospace/src/mycode/code_suite_test.go:12 (0x37f08)
+TestFoo: RunSpecs(t, "Foo Suite")`))
+		})
+	})
+})