Releasing version 0.9.0.

Releasing version 0.8.0.

Releasing version 0.7.2.

Releasing version 0.7.1.

Releasing version 0.7.0.

Tag the license in the gemspec.

Releasing version 0.6.0.

Releasing versison 0.5.0.

Releasing version 0.4.0.

for build time tests: removed obsolete Makefile, packaged Rakefile

Releasing version 0.3.1.

Releasing version 0.3.0.