Merge branch 'release0.2.6'
Merge branch 'release0.2.7'
Merge branch 'release0.2.8'
Merge branch 'master' of github.com:trema/trema
Merge branch 'release0.3.0'
Merge branch 'release0.3.1'
Merge branch 'release0.3.2'
Merge branch 'release0.3.3'
Merge branch 'release0.3.4'
Merge branch 'release0.3.5'
Merge branch 'release0.3.6'
Merge branch 'release0.3.7'
Merge branch 'release0.3.8'
Merge branch 'release0.3.9'
Merge branch 'release0.3.10'
Make PacketIn#initialize_copy private (refs #218)
Refactoring trema.gemspec

- Explicitly specify that Trema is only for Linux.
- Remove redundant dependencies.
Updated :development gem bundle.
Updated code climate badge
Updated StatsReply#stats YARD comment (Thanks Tomizawa-san).