Is it required to keep the default install files in the root after successfully deploying a project?

I'm referring to files like:
/
- bigtree.sql
- example-site.sql
- install.php
/core
- example-site

Haven't crawled the whole directory structure, might be some more left somewhere.

I like clean projects

I'm trying to build a calendar plugin for a website and trying to get the data from the BTXEvents extension to the template now.
Stumbled upon something maybe someone can clarify?

I've succesfully entered a recurring event in the module, but didn't include an end date. If I see correctly in events.php the query is caching the event date for - 1 year and + 2 years. However when I use the getUpcomingEvents feature the recurring event only is shown once with the initial setup date. The btx_events_date_cache table contains only 1 rule with the initial data.

Is it meant to be only one entry in the db? Or should the query write a row for each recurring event. If not i'd have to calculate the future events in the frontend, doesn't seem the appropriate way right?

I've already updated the core to the lastest version prior to installing the events extension however when I post a new event or category it's not saving the form data to the database.

Does anyone know what's up?

As you can see other data like ID, recurring and dates are stored like a charm

Think you already developed a news handling extension. Perhaps you could share it in the extension library? Would be much appreciated!