Publish on crates.io
Add some metadata for crates.io.
Merge branch 'master' into crates.io

Conflicts:
	Cargo.toml
v0.2.0
Merge branch 'master' into crates.io
v0.2.1
Merge branch 'master' into crates.io

Conflicts:
	Cargo.toml
Merge branch 'master' into crates.io
Merge branch 'crates.io'
v0.2.4