Update README.md

Author: john-h-k

README.md

@@ -1,6 +1,6 @@
 # EncryptorAppVS
 
-[![Build status](https://ci.appveyor.com/api/projects/status/lspd6npm0sbwtscm?svg=true)](https://ci.appveyor.com/project/johnkellyoxford/encryptionapp) [![Build status](https://ci.appveyor.com/api/projects/status/lspd6npm0sbwtscm/branch/dev?svg=true)](https://ci.appveyor.com/project/johnkellyoxford/encryptionapp/branch/dev) [![Build status](https://ci.appveyor.com/api/projects/status/lspd6npm0sbwtscm/branch/experimental?svg=true)](https://ci.appveyor.com/project/johnkellyoxford/encryptionapp/branch/experimental)
+[![Master build status](https://ci.appveyor.com/api/projects/status/lspd6npm0sbwtscm?svg=true)](https://ci.appveyor.com/project/johnkellyoxford/encryptionapp) [![Build status](https://ci.appveyor.com/api/projects/status/lspd6npm0sbwtscm/branch/dev?svg=true)](https://ci.appveyor.com/project/johnkellyoxford/encryptionapp/branch/dev) [![Build status](https://ci.appveyor.com/api/projects/status/lspd6npm0sbwtscm/branch/experimental?svg=true)](https://ci.appveyor.com/project/johnkellyoxford/encryptionapp/branch/experimental)
 
 ## Documentation: