Update and rename INSTALL to INSTALL.md

INSTALL → INSTALL.md

@@ -4,7 +4,9 @@ How to install wiringPi
 
 The easiest way is to use the supplied 'build' script:
 
+```
   ./build
+```
 
 that should do a complete install or upgrade of wiringPi for you.
 
@@ -13,22 +15,25 @@ That will install a dynamic library.
 Some distributions do not have /usr/local/lib in the default LD_LIBRARY_PATH. To
 fix this, you need to edit /etc/ld.so.conf and add in a single line:
 
-  /usr/local/lib
+``/usr/local/lib``
 
 then run the ldconfig command.
 
-  sudo ldconfig
+``sudo ldconfig``
 
 If you want to install a static library, you may need to do this manually:
 
+```
   cd wiringPi
   make static
   sudo make install-static
-
+```
 
 To un-install wiringPi:
 
+```
   ./build uninstall
+```
 
 Gordon Henderson