Update TravisCI to goclean script.

Also, correct a couple of issues found by running the script.

.travis.yml

@@ -1,17 +1,15 @@
 language: go
-go:
-  - 1.2
-  - release
-  - tip
+go: release
+before_install:
+  - gocleandeps=c16c849abae90c23419d
+  - git clone https://gist.github.com/$gocleandeps.git
+  - goclean=71d0380287747d956a26
+  - git clone https://gist.github.com/$goclean.git
 install:
   - go get -d -t -v ./...
-  - go get -v code.google.com/p/go.tools/cmd/vet
-  - go get -v github.com/GeertJohan/fgt
-  - go get -v github.com/golang/lint/golint
+  - bash $gocleandeps/gocleandeps.sh
 script:
   - export PATH=$PATH:$HOME/gopath/bin
-  - go vet ./...
-  - fgt golint .
-  - fgt golint memdb
-  - fgt golint ldb
-  - go test -v
+  - bash $goclean/goclean.sh
+after_success:
+  - goveralls -coverprofile=profile.cov -service=travis-ci

example_test.go

@@ -6,6 +6,7 @@ package btcdb_test
 
 import (
 	"fmt"
+
 	"github.com/conformal/btcdb"
 	_ "github.com/conformal/btcdb/memdb"
 	"github.com/conformal/btcnet"

ldb/operational_test.go

@@ -199,7 +199,7 @@ func testBackout(t *testing.T) {
 		return
 	}
 	if _, err := db.ExistsSha(sha); err != nil {
-		t.Errorf("ExistsSha: unexpected error: %v")
+		t.Errorf("ExistsSha: unexpected error: %v", err)
 	}
 	_, err = db.FetchBlockBySha(sha)
 	if err != nil {
@@ -213,7 +213,7 @@ func testBackout(t *testing.T) {
 		return
 	}
 	if _, err := db.ExistsSha(sha); err != nil {
-		t.Errorf("ExistsSha: unexpected error: %v")
+		t.Errorf("ExistsSha: unexpected error: %v", err)
 	}
 	_, err = db.FetchBlockBySha(sha)
 	if err != nil {