add YHBar spec

+Pod::Spec.new do |s|
+  s.name             = "YH_Bar"
+  s.version          = "1.0.0"
+  s.license      = { :type => 'MIT', :file => 'LICENSE' }
+  s.summary          = "YH_Bar"
+  s.description      = <<-DESC
+                       Enhanced & Extended ZXing Library
+                       DESC
+  s.homepage         = "http://git.yoho.cn/ios/yh_webp"
+  s.author           = { "zhuxj" => "xiaojun.zhu@yoho.cn" }
+  s.source           = { :git => "http://git.yoho.cn/ios/YH_BarScanner.git", 
+                         :branch => 'master', 
+                         :tag => s.version.to_s }
+
+  s.platform     = :ios, '7.0'
+  s.requires_arc = true
+  s.xcconfig = { "OTHER_LDFLAGS" => "-ObjC" }
+
+  s.vendored_frameworks = 'YHBar/YHBar.framework'
+
+end