Add tasks for all the new languages

Task/File-size/Lingo/file-size.lingo

@@ -0,0 +1,13 @@
+----------------------------------------
+-- Returns file size
+-- @param {string} filename
+-- @return {integer}
+----------------------------------------
+on getFileSize (filename)
+  fp = xtra("fileIO").new()
+  fp.openFile(filename, 1)
+  if fp.status() then return 0
+  len = fp.getLength()
+  fp.closeFile()
+  return len
+end