feat: add ignore option (fix #31) (#37)

- Add functionality to ignore files based on provided
regular expressions
- Support writeIndex and writeIndexCli
- in index.js config must be specified as below

    // @create-index {"ignore":["/foo.js"]}

src/utilities/log.js

@@ -2,8 +2,6 @@ import chalk from 'chalk';
 import moment from 'moment';
 
 export default (...append) => {
-    /* eslint-disable no-console */
+  // eslint-disable-next-line
   console.log(chalk.dim('[' + moment().format('HH:mm:ss') + ']'), ...append);
-
-    /* eslint-enable no-console */
 };