Merge pull request #301 from rdkcentral/fix/indexDocsFolder

Added index file to docs folder of sdk

Author: michielvandergeest

docs/index.md

@@ -0,0 +1,25 @@
+# Lightning SDK Reference
+
+
+The Reference Documentation for Lightning SDK contains detailed descriptions of the Lightning SDK *Plugins* that you can use when you are developing Apps with Lightning SDK.
+
+
+The available Lightning SDK plugins are, in alphabetical order:
+
+* [FPS Counter](plugins/fpscounter.md)
+* [Image](plugins/image.md)
+* [Language](plugins/language.md)
+* [Lightning](plugins/lightning.md)
+* [Log](plugins/log.md)
+* [Metrics](plugins/metrics.md)
+* [Pin](plugins/pin.md)
+* [Profile](plugins/profile.md)
+* [Purchase](plugins/purchase.md)
+* [Registry](plugins/registry.md)
+* [Router](plugins/router/index.md)
+* [Settings](plugins/settings.md)
+* [Storage](plugins/storage.md)
+* [TV](plugins/tv.md)
+* [Utils](plugins/utils.md)
+* [VersionLabel](plugins/versionlabel.md)
+* [VideoPlayer](plugins/videoplayer.md)