Removes unnecessary archive.html file
Changes the port of the local server in the config file
Changes the watch task to depend on the build task
Changes build task

The task now follows the gulp.js guidelines and removes the execution
of the jekyll build command
Several changes in the tasks of gulp file

- Adds a list of paths to easily maintaining the file paths
- Clean task is now deleting directories generated by Jekyll
- Coffe task compiles .coffee files and concatenates them in the
main.js file
- Scripts task only concatenates and minifies the .js files in
vendor.js file
Adds the new main.js and vendor.js files
Updates the script tags for the new JS files in the default layout