Install etcd from source on travis; run tests on go 1.2.1 and 1.3.1

Signed-off-by: John Tuley <jtuley@pivotal.io>
Grab the source code for etcd but not install it.
Install etcd into gopath

Signed-off-by: John Tuley <jtuley@pivotal.io>
Fix typo

Signed-off-by: John Tuley <jtuley@pivotal.io>
Use explicit GOPATH

Signed-off-by: John Tuley <jtuley@pivotal.io>
Correct some gopath issues

Signed-off-by: John Tuley <jtuley@pivotal.io>
Return to correct directory after installing etcd

Signed-off-by: John Tuley <jtuley@pivotal.io>
Merge branch 'master' into use-new-yagnats-wrappers