Add changelog.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.0' into 2.1
Update changelog.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1' into 2.2
Update changelog.

Signed-off-by: crynobone <crynobone@gmail.com>
Update badge.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1' into 2.2

Signed-off-by: crynobone <crynobone@gmail.com>

Conflicts:
	README.md
Merge branch '2.2'

Signed-off-by: crynobone <crynobone@gmail.com>

Conflicts:
	README.md