add travis and coverall badges to README
add travis and coverall badges to README

dzc34/Asqatasun,medsob/Tanaguru,Asqatasun/Asqatasun,dzc34/Asqatasun,medsob/Tanaguru,dzc34/Asqatasun,Tanaguru/Tanaguru,dzc34/Asqatasun,Asqatasun/Asqatasun,medsob/Tanaguru,Asqatasun/Asqatasun,medsob/Tanaguru,Tanaguru/Tanaguru,Asqatasun/Asqatasun,Tanaguru/Tanaguru,Asqatasun/Asqatasun,Tanaguru/Tanaguru,dzc34/Asqatasun