Broken load-theme-buffer-local #5

[vt5491]

use 'noflet' instead of 'flet' to override the functions 'custom-theme-buffer-local-recalc-face' and 'custom-theme-buffer-local-recalc-variable'. In later versions of emacs, 'flet' is reverting to lexical binding instead of dynamic binding, thus the methods are no longer being hooked downsteam.

This introduces a dependency on package 'noflet'. I did not update the autoload to automatically require this package.

Without this fix, on certain versions of emacs you will get the following message when trying to run 'load-theme-buffer-local':

Symbol's function definition is void: symbol