Use LndHub and LNDhub.go consistently

There are various spelling of LndHub used accross the documentation.
Let's use LndHub for the original version and LNDhub.go for the rewrite.

Author: prusnak

README.md

@@ -75,7 +75,7 @@ Alternatively you can also use the [Alby simnetwork](https://github.com/getAlby/
 
 ## Database
 
-LndHub.go requires a PostgreSQL database backend.
+LNDhub.go requires a PostgreSQL database backend.
 
 ## Prometheus
 

notes.md

@@ -1,8 +1,8 @@
 # Rebuilding LndHub
 
-Goal of this project is to build a simple accounting system with a [LNDHub](https://github.com/BlueWallet/LndHub) compatible API that focusses on simplicity, maintainability and ease of deployment.
+Goal of this project is to build a simple accounting system with a [LndHub](https://github.com/BlueWallet/LndHub) compatible API that focusses on simplicity, maintainability and ease of deployment.
 
-[LNDHub](https://github.com/BlueWallet/LndHub) is a simple accounting system for LND. It allows users to send and receive lightning payments. Through the API people can access funds through a shared lightning node. (see overview.png diagram)
+[LndHub](https://github.com/BlueWallet/LndHub) is a simple accounting system for LND. It allows users to send and receive lightning payments. Through the API people can access funds through a shared lightning node. (see overview.png diagram)
 
 Some design goals:
 
@@ -17,7 +17,7 @@ Some design goals:
 
 ### API endpoints
 
-See [LNDHub API](https://github.com/BlueWallet/LndHub/blob/master/controllers/api.js) for enpoints and request/response signatures.
+See [LndHub API](https://github.com/BlueWallet/LndHub/blob/master/controllers/api.js) for enpoints and request/response signatures.
 
 #### /create
 Create a new user account
@@ -59,4 +59,4 @@ Node information
 
 ### Links
 
-* [LNDHub](https://github.com/BlueWallet/LndHub) - Current nodejs implementation
+* [LndHub](https://github.com/BlueWallet/LndHub) - Current nodejs implementation