* lisp/startup.el (fancy-splash-text): Add URL of guided tour.
Adjust horizontal and vertical whitespace.
* lisp/progmodes/compile.el (compilation-handle-exit):
Use run-hook-with-args to run compilation-finish-functions.
* lisp/files.el (file-start-mode-alist): New variable.
(magic-mode-regexp-match-limit): Doc fix.
(set-auto-mode): Handle file-start-mode-alist.
A little cleanup of structure.