Allow phrase queries

Search terms with spaces (AKA phrase queries) are now supported instead of returning HTTP 500

Allow filtering by book

Feature-wise: allow filtering by book, change the colors in dark mode a little

Otherwise, just dependency upgrades

Split ePub parser out of web server

v5

Remove epub parsing code

Add context to search results

v4

Rename project

Design overhaul

Made it fully responsive, and added a dark mode.

Although, the design is still boring. But at least it works on more screen sizes now.

Improved CSS

The mobile view looks okay now. Better spacing, more consistent. But it's still not a great solution and it looks like garbage on a real computer or a tablet. But hey, it's better than yesterday.

v1 - Initial release

MVP features are complete, so calling this v1. I don't think I'm gonna be doing semantic versioning for this. Seems weird for a UI