Release 1.2.0

Update to v1.1.2 for doc changes, maven central does not allow update…

…s to existing version

Release 1.1.1

Release 1.1.0

Removed testHugeWrite due to travis memory limitations.

Release 1.0.2 (amazon-ion#95)

Release 1.0.1

Updates ion-tests submodule.

Edits README.md

Makes the markdown more compliant.
Minor style edits.

cr https://cr.amazon.com/r/5148017/