Bundle & download captured pages as a ZIP file

Improvements over v0.2:

1. By default, document pages are now bundled & downloaded as a single ZIP file, following idea from @andygock. This applies to the bookmark as well. This feature can be turned off in manual mode via options.
2. Polished README
3. Polished code

Changelog

• Polished README by @apankowski in #12
• Consistent code style by @apankowski in #13
• Update README by @apankowski in #15
• Code decoupling simplification and abstraction by @apankowski in #17
• Bundle all captured page images in a ZIP file by @apankowski in #18

Full Changelog: v0.2...v0.3

Automated version with bookmark available

Improvement over v0.1:

1. no limitations on number of pages downloaded at a time
2. automatic preloading of pages and their download whenever they're loaded
3. download process is customizable with options with reasonable defaults
4. no manual steps necessary except for initial invocation
5. bookmark code and instructions: simply click to download all pages in one go
6. script converting images back to a (possibly searchable PDF)

Changelog

• Create JS to paste and download all images by @mgonzalezg9 in #5
• Introduce .editorconfig by @apankowski in #6
• Clean up image to PDF conversion script and instructions by @apankowski in #7
• Unify image downloading scripts, introducing options by @apankowski in #8
• Automated page preloading by @apankowski in #9
• Automated download process by @apankowski in #10
• Bookmark for automatic download by @apankowski in #11

New Contributors

• @mgonzalezg9 made their first contribution in #5

Full Changelog: v0.1...v0.2

Initial version

Initial version with significant limitations:

1. manual steps to be done before downloading document pages
2. repeatedly calling JS function in Developer Console for each batch of images
3. manual steps to convert back to a PDF