Update reference to internal markdown documents

docs/guides/index.md

@@ -77,15 +77,15 @@ If you want to run run a specific test you can just add the filename:
 $ yarn test test/testName.js
 ```
 
-You can also run the tests on a [geth node](./docs/private-geth-testing.md).
+You can also run the tests on a [geth node](./docs/reference/private-geth-testing.md).
 
 ## Contract documentation
 This repository contains the contracts currently in use by uPort. This is also where you find the addresses of these contracts currently deployed on Mainnet and relevant test networks. Below you can find descriptions of each of the contracts and the rationale behind the design decisions.
 
-#### [Proxy](./docs/proxy.md)
-#### [TxRelay](./docs/txRelay.md)
-#### [IdentityManager](./docs/identityManager.md)
-#### [MetaIdentityManager](./docs/metaIdentityManager.md)
+#### [Proxy](./docs/reference/proxy.md)
+#### [TxRelay](./docs/reference/txRelay.md)
+#### [IdentityManager](./docs/reference/identityManager.md)
+#### [MetaIdentityManager](./docs/reference/metaIdentityManager.md)
 
 ### Main contract interactions
 The most important interactions with the contracts are creation of identities and sending transactions. Here are visual representations of this being executed.