Merge pull request #696 from IRCody/update_plugin_authoring_doc

Fixed some links in docs/PLUGIN_AUTHORING.md.

docs/PLUGIN_AUTHORING.md

@@ -87,9 +87,9 @@ GetConfigPolicy() (*cpolicy.ConfigPolicy, error)
 Publish(contentType string, content []byte, config map[string]ctypes.ConfigValue) error
 ```
 ### Exposing a plugin
-Creating the main program to serve the newly written plugin as an external process in main.go. By defining "Plugin.PluginMeta" with plugin specific settings, the newly created plugin may have its setting to override snap global settings. Please refer to [a sample](https://github.com/intelsdi-x/snap/blob/master/plugin/collector/snap-collector-mock1/main.go) to see how main.go is written. You may browse [snap global settings](https://github.com/intelsdi-x/snap/blob/master/snap.go#L45-L119).
+Creating the main program to serve the newly written plugin as an external process in main.go. By defining "Plugin.PluginMeta" with plugin specific settings, the newly created plugin may have its setting to override snap global settings. Please refer to [a sample](https://github.com/intelsdi-x/snap/blob/master/plugin/collector/snap-collector-mock1/main.go) to see how main.go is written. You may browse [snap global settings](https://github.com/intelsdi-x/snap/blob/master/snapd.go#L45-L119).
 
-Building main.go generates a binary executable. You may choose to sign the executable with our [plugin signing](https://github.com/intelsdi-x/snap/blob/master/pkg/psigning/README.md).
+Building main.go generates a binary executable. You may choose to sign the executable with our [plugin signing](https://github.com/intelsdi-x/snap/blob/master/docs/PLUGIN_SIGNING.md).
 
 ### Localization
 All comments and READMEs within the plugin code should be in English.  For different languages, include appropriate translation files within the plugin package for internationalization.