fix lint; add eslint

Author: iurimatias

.gitignore

@@ -12,4 +12,5 @@ test_app/.embark/development/
 test_app/config/production/password
 test_app/node_modules/
 test_app/chains.json
-.idea
+.idea
+.eslintrc.json

lib/contracts/code_generator.js

@@ -11,7 +11,7 @@ const Templates = {
   web3_connector: require('./code_templates/web3-connector.js.ejs'),
   do_when_loaded: require('./code_templates/do-when-loaded.js.ejs'),
   exec_when_env_loaded: require('./code_templates/exec-when-env-loaded.js.ejs')
-}
+};
 
 class CodeGenerator {
   constructor(options) {