Add podspec.

Author: devxoul

UITextView+Placeholder.podspec

@@ -0,0 +1,14 @@
+Pod::Spec.new do |s|
+  s.name         = "UITextView+Placeholder"
+  s.version      = "1.0.0"
+  s.summary      = "A missing placeholder for UITextView."
+  s.homepage     = "https://github.com/devxoul/UITextView-Placeholder"
+  s.license      = { :type => 'MIT', :file => 'LICENSE' }
+  s.author       = { "devxoul" => "devxoul@gmail.com" }
+  s.source       = { :git => "https://github.com/devxoul/UITextView-Placeholder.git",
+                     :tag => "#{s.version}" }
+  s.platform     = :ios, '7.0'
+  s.requires_arc = true
+  s.source_files = 'UITextView+Placeholder/UITextView+Placeholder.{h,m}'
+  s.frameworks   = 'Foundation', 'UIKit'
+end