Prepare for find-file-hooks being removed from Emacs.

* tex.el (VirTeX-common-initialization): Define a variable alias
for find-file-hook on XEmacs.
Replace `read-string' with `TeX-read-string'

Rationale: `TeX-read-string' inherits current input method, that users may
easily toggle with "C-\" if needed.
Added ChangeLog entries for commit [0c2cfc8]
Add copyright notice to style/foils.el
Fix documentation about changing font attributes of existing text

* doc/quickstart.texi (Editing Facilities): Fix documentation: to change
  font attributes of existing text, it has to be marked as an _active_
  region.
Fix typo

* doc/auctex.texi (Selecting a Command): Fix typo.
Update manual

* doc/auctex.texi (Automatic Local): Update description of
`TeX-style-path', `TeX-style-global', `TeX-style-local', and
`TeX-auto-local' variables: there is no need to end directories and
directories lists items with a slash.
Update the FAQ entry about failing `TeX-next-error' behavior

* doc/faq.texi: Update the `Why does 'TeX-next-error' ('C-c `') fail?'
entry, taking into account the `TeX-file-line-error' option.  Update
copyright range.