We support just two variables in the configuration: gravity and width.
Image will be place left, center or right aligned, and width will be
WRAP_CONTENT or MATCH_PARENT
* Added retention annotation for Alignment IntDef (#3)
* Task lists (#4)
* Added since annotation to newly added method/classes
* Fixed the indexes bug for margin spans (#6)
* Feature: Revert spans order (#11)
* SpannableBuilder
* Removed nullablity from Markwon class (no null markdown)
* Image sizes via HTML (#13)
