Issue #73, correct behavior of `delete-indentation`.

The `delete-indentation` function should work properly for PHP.  This
means modifying the logic of `fixup-whitespace` so that it eliminates
spaces before ',', ';', '->' amd '::' and after '->' and '::'.

Signed-off-by: Eric James Michael Ritz <lobbyjones@gmail.com>
Update php-mode-modified for the change to delete-indentation
Merge branch 'master' of https://github.com/ejmr/php-mode

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