added coverall integration into travis

.travis.yml

@@ -1,8 +1,11 @@
 language: go
 sudo: false
 go:
-  - tip
+- tip
 before_install:
-  - go get github.com/mattn/goveralls
+- go get github.com/mattn/goveralls
 script:
-  - $GOPATH/bin/goveralls -service=travis-ci
+- "$GOPATH/bin/goveralls -service=travis-ci"
+env:
+  global:
+    secure: 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