Make LUA scripting work even if proxmark3 is called from arbitrary working directory

- add @gpakosz whereami library (https://github.com/gpakosz/whereami) in order to ...
- determine and set absolute paths for LUA scripts and LUA libraries

client/scripting.h

@@ -12,6 +12,10 @@
 
 #include <lua.h>
 
+#define LUA_LIBRARIES_DIRECTORY 	"lualibs/"
+#define LUA_SCRIPTS_DIRECTORY 		"scripts/"
+#define LUA_LIBRARIES_WILDCARD 		"?.lua"
+
 /**
  * @brief set_libraries loads the core components of pm3 into the 'pm3'
  *  namespace within the given lua_State