- bump patch version to `0.1.2`

- update information in `readme.md`, including a section about possible problems one may encounter
- increase the number of fields in `manifest.json`
- make the extension name and descriptions longer
- general cleanup
- did a little testing of the distribution in all browsers, and everything seemed functional

- add screenshots under `/public/screenshots/`

- link the screenshots in `readme.md`
- fix the jumping window width issue of  `option.html` when it is opened up in popup mode, while also being compatible with mobile view (occupying all available width), and desktop view (occupying just enough width)
- forgot to make the open-source links in `option.html` actually open up a new tab
- the "download" button now always blinks red when clicked on, since we have yet to implement that feature
- bump patch version to `v0.1.1`