made import work, added unimport, aliased rm to fs.remove

lib/shutil.lua

@@ -22,6 +22,19 @@ function shutil.import(lib)
  end
  require(lib)
  nE[#nE+1] = lib
+ os.setenv("INCLUDE",nE)
+ return true
+end
+
+function shutil.unimport(lib)
+ local cE = os.getenv("INCLUDE") or shell.include
+ local nE = {}
+ for k,v in pairs(cE) do
+  if v ~= lib then
+   nE[#nE+1] = v
+  end
+ end
+ os.setenv("INCLUDE",nE)
  return true
 end
 
@@ -103,5 +116,6 @@ end
 shutil.cd = os.chdir
 shutil.mkdir = fs.makeDirectory
 shutil.cp = fs.copy
+shutil.rm = fs.remove
 
 return shutil