Release v0.2.2 (rust-random#201)

Release v0.2.1 (rust-random#188)

Updates Changelog to include v0.1.16 changes as well

Release v0.1.16 (rust-random#185)

Update Changelog for 0.2

Signed-off-by: Joe Richey <joerichey@google.com>

Release v0.1.15

Signed-off-by: Joe Richey <joerichey@google.com>

Prepare release v0.1.14 (rust-random#128)

Prepare release v0.1.13 (rust-random#118)

Prepare release v0.1.12 (rust-random#103)

Prepare release v0.1.11 (rust-random#97)

Prepare release v0.1.10 (rust-random#93)