Add vendor dir (#16) (#4)

* Add vendor dir so builds dont require dep

* Pin specific version go-eth version

vendor/github.com/ethereum/go-ethereum/build/pod.podspec

@@ -0,0 +1,22 @@
+Pod::Spec.new do |spec|
+  spec.name         = 'Geth'
+  spec.version      = '{{.Version}}'
+  spec.license      = { :type => 'GNU Lesser General Public License, Version 3.0' }
+  spec.homepage     = 'https://github.com/ethereum/go-ethereum'
+  spec.authors      = { {{range .Contributors}}
+		'{{.Name}}' => '{{.Email}}',{{end}}
+	}
+  spec.summary      = 'iOS Ethereum Client'
+  spec.source       = { :git => 'https://github.com/ethereum/go-ethereum.git', :commit => '{{.Commit}}' }
+
+	spec.platform = :ios
+  spec.ios.deployment_target  = '9.0'
+	spec.ios.vendored_frameworks = 'Frameworks/Geth.framework'
+
+	spec.prepare_command = <<-CMD
+    curl https://gethstore.blob.core.windows.net/builds/{{.Archive}}.tar.gz | tar -xvz
+    mkdir Frameworks
+    mv {{.Archive}}/Geth.framework Frameworks
+    rm -rf {{.Archive}}
+  CMD
+end