 #1137: Add installing `libyaml-cpp-dev` to <.travis.yml>.
 #1137: Add installing `libyaml-cpp-dev` to <.travis.yml>.

tst-ccamp/earthenterprise,tst-lsavoie/earthenterprise,tst-mswartz/earthenterprise,tst-eclamar/earthenterprise,tst-mswartz/earthenterprise,tst-mswartz/earthenterprise,tst-eclamar/earthenterprise,tst-eclamar/earthenterprise,tst-lsavoie/earthenterprise,tst-eclamar/earthenterprise,google/earthenterprise,tst-mswartz/earthenterprise,tst-ccamp/earthenterprise,tst-ccamp/earthenterprise,google/earthenterprise,google/earthenterprise,tst-lsavoie/earthenterprise,tst-ccamp/earthenterprise,tst-eclamar/earthenterprise,tst-eclamar/earthenterprise,tst-lsavoie/earthenterprise,tst-mswartz/earthenterprise,tst-ccamp/earthenterprise,google/earthenterprise,tst-mswartz/earthenterprise,google/earthenterprise,tst-ccamp/earthenterprise,tst-lsavoie/earthenterprise,google/earthenterprise,tst-lsavoie/earthenterprise,tst-ccamp/earthenterprise,tst-lsavoie/earthenterprise,tst-ccamp/earthenterprise,tst-eclamar/earthenterprise,tst-mswartz/earthenterprise,tst-ccamp/earthenterprise,tst-eclamar/earthenterprise,google/earthenterprise,tst-eclamar/earthenterprise,tst-lsavoie/earthenterprise,tst-mswartz/earthenterprise,google/earthenterprise