Tracking issue for possible breaking changes

[kotauskas]

This is a place to discuss and suggest breaking changes that we can implement before releasing 1.0. I couldn't come up with many, so active discussion is encouraged. Here's a list of what I've acknowledged:

• Add custom flags and remove builtin support for the question mark flag as an abstraction measure (adds generic parameters to pretty much everything, meaning that it'll be a major breaking change).
• Allow custom information for tiles (again, that's a generic parameter to put everywhere, so it's surely massively breaking).
• Refactor coordinates into 2-element arrays done in 0.3.0.

[kotauskas]

Custom tile payloads and flags are now implemented on 28858b8. Let's release the first release candidate!

[kotauskas]

Custom tile payloads and flags are now implemented on 28858b8. Once we get #2 done, we can release 1.0.