Sqlite Compatibility

Hi,

I've been using the [wp-sqlite-db](https://github.com/aaemnnosttv/wp-sqlite-db) Sqlite plugin which is regularly maintained. It works pretty well with the main WordPress plugin but the obvious caveat being this doesn't apply to plugins.

I started using WP2Static recently and I'd really like to get it working with Sqlite.

A brief look revealed the following files generate platform specific SQL code:
- Addons
- Controller
- CoreOptions
- CrawlCache
- CrawlQueue
- DeployCache
- JobQueue
- WsLog

I've been programming for years but I'm not a WordPress or PHP developer, unfortunately WordPress is ubiquitous and I've had to get acquainted. I would be happy to take this on. Is there a way I can do this as an add-on? Obviously I want to avoid forking the project if possible. Any help appreciated.

Matt :-)