Regenerate gemspec for version 0.4.6

Regenerate gemspec for version 0.4.5

exclude samples from release

Regenerate gemspec for version 0.4.3

Regenerate gemspec for version 0.4.2

Regenerate gemspec for version 0.4.1

Regenerate gemspec for version 0.4.0

Regenerate gemspec for version 0.3.4

Regenerate gemspec for version 0.3.3

Regenerate gemspec for version 0.3.2