PR fixes; remove all infura token references and setup travis to use encrypted env

variable; rest of the ethjson_rpc dependent tests extracted to integration_test

pkg/contract_watcher/shared/parser/parser.go

@@ -98,7 +98,7 @@ func (p *parser) lookUp(contractAddr string) (string, error) {
 		return v, nil
 	}
 
-	return "", errors.New("ABI not present in lookup tabe")
+	return "", errors.New("ABI not present in lookup table")
 }
 
 // Returns only specified methods, if they meet the criteria