* Switched standard to eslint with eslint-config-standard (and 4 more eslint plugins needed by standard).
* Added "curly" eslint rule with "all" option. I like it.
* Refactored all JS files to apply the new "curly" eslint rule.
* Renewed axios.min.js, dropzone.min.js and sweetalert.min.js. Re-minified and added a small comment stating their version and copyright statement.
* Some buttons in dashboard will now show loading icon whenever they're waiting for response from the server.
* Updated README.md and .gitignore.
* Properly merged changes from master.
* database/migration.js will now exit after migartion.
* Replaced all instances of createTableIfNotExists() into a combination of hasTable() and createTable() in db.js.
* It will now properly create "editedAt" and "zipGeneratedAt" columns into "albums" table, which will then be used for the "Download Album" feature. Previously, due to the lack of those columns, people could not download albums. Existing installation will have to do some manual patches, which I will describe further in the commit's comments.
* Thumbnail-less files will properly show the extensions in albums. Previously it would have two dots.
* Switched ESLint + Aqua to Standard. I'm a big fan of Standard. Updated yarn.lock file too.
* Lots of refactors to follow the rules of Standard.
* Fixed issue with uploading as a not logged in user.
