Add notes about alternative lib and sybmols files.

README.md

@@ -92,7 +92,9 @@ To build and install the library:
     ```
     This will place the following directories at the install location:  
     * `CMAKE_INSTALL_PREFIX/include/` - contains header and mod files
-    * `CMAKE_INSTALL_PREFIX/lib/` - contains `cmake` directory and `.so` files
+    * `CMAKE_INSTALL_PREFIX/lib/` - contains `cmake` directory and `.so` files  
+       _Note: depending on your system and architecture `lib` may be `lib64`, and 
+       you may have `.dll` files or similar._
 
 
 ## Usage
@@ -214,6 +216,7 @@ unless installing in a default location:
 ```
 export LD_LIBRARY_PATH = $LD_LIBRARY_PATH:<path/to/install/location>/lib
 ```
+_Note: depending on your system and architecture `lib` may be `lib64` or something similar._
 
 
 ## Examples