update readme
Merge pull request #19 from bonifaido/master

What is optimized? section corrected in README
Fix #21
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[maven-release-plugin] prepare release jackson-module-afterburner-2.2.1
[maven-release-plugin] prepare for next development iteration
Add a test case showing that writing out interface types breaks horribly
Disable Afterburner on interfaces until it works
Merge pull request #24 from stevenschlansker/interface-serialization

Prevent afterburner from working on interfaces
Test that we do something reasonable on IllegalAccessError
Protect OptimizedBeanPropertyWriter against IllegalAccessException and SecurityException
Protect BeanPropertyMutator against IllegalAccessError and SecurityError
Merge pull request #20 from stevenschlansker/guard-iae

Protect Afterburner against IllegalAccessError and SecurityException
update release notes wrt #20