Works more-or-less ok -> release as not pre-release

fluent-plugin-wendelin.gemspec

 Gem::Specification.new do |gem|
     gem.name            = "fluent-plugin-wendelin"
-    gem.version         = "0.1.alpha1"
+    gem.version         = "0.1"
     gem.authors         = ["Kirill Smelkov"]
     gem.email           = ["kirr@nexedi.com"]
     gem.summary         = %q{Fluentd output to Wendelin}