Completed task: "Add gulp to our project".

This pull request addresses the following issue:

#95: Add gulp to our project

Only a JSHint task was added. To run the gulp task, navigate to the directory where `gulpfile.js` is located and run `gulp jshint`. This is under the assumption that Gulp is installed globally. I've also taken the liberty to fix many of the errors/warnings thrown by JSHint. Upon running the task, there should be no errors returned based on the current JSHint configuration. This is only a basic configuration and should be improved on once we have a style guide to follow.