add SignAndSave to Alert_tests
Updated signed alert test data to reflect Dogecoin keys
Merge pull request #452 from leofidus/1.7-alerttests

add SignAndSave to Alert_tests
Adding the configuration for Travis CI
Adding the current build status to the Readme file
Merge pull request #474 from tazz2004/1.7-dev-Travis-CI

1.7 dev Travis CI