Protect against rare NPE
Merge pull request #32 from francoisforster/patch-1

Protect against rare NPE -- I assume you have experienced this? In an error condition or... ?
Looks like OSGi requires inclusion of 'impl' package (not included in default exports)
Add proper LICENSE and NOTICE files, to be included in artifacts.
Update VERSION to note impl of #14
Update release notes, to release 0.9.9
[maven-release-plugin] prepare release compress-lzf-0.9.9
[maven-release-plugin] prepare for next development iteration
testing access rights
Implemented #34, conditional compression
[maven-release-plugin] prepare release compress-lzf-0.9.10
[maven-release-plugin] prepare for next development iteration
...
Prepare for 1.0.0 release
[maven-release-plugin] prepare release compress-lzf-1.0.0
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release compress-lzf-1.0.0c
[maven-release-plugin] prepare for next development iteration
update README
javadoc improvements