Added appendStrings to readme + fixed broken link.

Author: JarkoDubbeldam

README.md

@@ -25,4 +25,5 @@ One of those pesky things about packages, especially when you need to use multip
 
 ## Current included functions:
 
-[`C`](R\C.R): Numerical concatenation. Paste digits together and output a numeric.
+[`C`](https://github.com/JarkoDubbeldam/RG/blob/appendString/R/C.R): Numerical concatenation. Paste digits together and output a numeric.
+[`+`](https://github.com/JarkoDubbeldam/RG/blob/appendString/R/AppendStrings.R): Augmented to be useful for strings. Works like `paste0` on strings.