Improve Documentation

[johnpryan]

• MapController https://github.com/apptreesoftware/flutter_map/issues/58
• Plugin API
• Code comments
• feature roadmap
• Layer types (MBTiles, etc)

[neiljaywarner]

how can you use mapbox styles - or can you?

[GregorySech]

@johnpryan I'm starting to study the project to try and contribute a little.
Can I open a PR for possible comment improvements?
Do you need help for some specific area?
I'm wondering if some files should me moved, for example the TileProviders could get their own place instead of being all in tile_layers.dart except for MBTilesImageProvider.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[github-actions]

This issue was closed because it has been stalled for 5 days with no activity.