Bump version to v4.0

Add sleep mode support for 3.X.X. ^^

Bump version to v3.1

Bump version to v3.0

Fixed screen brightness problems (tested on 1.0.0 and 2.0.0). Some re…

…factoring.

v2.2 (and like always, transfer unmerged PRs)

v2.1 (and like always, transfer unmerged PRs)

[sdmmc] Change internal read/write retries

This can fix busy errors when writing to sd cards.
Additionally it now returns properly on success

v1.6 (and like always, tranfer unmerged PRs)