(MAINT) Add Travis Build Status to README.md
(MAINT) Add Travis Build Status to README.md

This commit adds a Travis Build Status link to the README.md.

camlow325/jvm-ssl-utils,puppetlabs/jvm-ssl-utils,puppetlabs/jvm-ssl-utils,steveax/jvm-ssl-utils,camlow325/jvm-ssl-utils,steveax/jvm-ssl-utils