Document Asset::removeVersioning().

Signed-off-by: crynobone <crynobone@gmail.com>
Add link to Github.

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

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

Conflicts:
	src/components/asset/index.md
	src/components/asset/usage.md