Add suppor for auto-releasing to rubygems.org from travis

.travis.yml

@@ -1,7 +1,10 @@
 language: ruby
 rvm:
-  - ruby-head
-  - 2.1
-  - 1.9.3
-  - jruby
-
+- ruby-head
+- 2.1
+- 1.9.3
+- jruby
+deploy:
+  provider: rubygems
+  api_key:
+    secure: NQDoSKjV0bs2MSZHHwP6gsG3a8JXCCT5nCHiggTvVV2vvFS9WCyBtMDY3WxQzAU/Zbt+FcPobOvbd53HW5hQYkDOpc84j/utVyBBZCtew0wjEY+Z18ygr+oUQtoALoaRh+cr3MUEFA1Q68fsLlzpRH4M6ZQxbUNOQtwNHgLaZco=

hermann.gemspec

@@ -7,6 +7,7 @@ require 'hermann/version'
 Gem::Specification.new do |s|
   s.name               = "hermann"
   s.version            = Hermann::VERSION
+  s.version            = [Hermann::VERSION, ENV['TRAVIS_BUILD_NUMBER'] || 'dev'].join('.')
 
   s.authors = ['R. Tyler Croy', 'James Way', "Stan Campbell"]
   s.description = 'Ruby gem for talking to Kafka'