Added revert functionality

[dizyart]

The new revert.php script is based completely on convert.php and behaves pretty much the same from the CLI point of view.

Since finding an "[" array token is not possible, I have taken the approach to consider every "[" token as an array and check for what is not an array by checking previous tokens for variables, object properties, functions (which might return arrays) and variable references ($this->{$varname}['index']).

Tested on a badly conventioned app with 6.500 files with approx. 1.650 replacements. No false positives were found. Still checking for false negatives (missed instances).

This should not be considered a thourough test though, additional test must be carried out.

[thomasbachem]

Great, thanks! Could you fix indentation (you doubled the number of tabs) and remove the unnecessary blank lines at lines 72, 81, 100 and 106? I'll merge it then :).

[thomasbachem]

Oh and remove the debug echo statements of course!

[dizyart]

Oops, first time using github online editor - forgot to check indents. Thanks for the comment and if you have the time, please double-check if my offset code is OK, since I had some issues with the backward-checking and counting bytes.

[dizyart]

I did, however leave the replacement count report at the end. Useful to see which files were changed when batch-converting complete projects,

[thomasbachem]

Now it's spaces, not tabs :-/

[dizyart]

Please accept my apologies, kind sir, there was a bee in my coffee and I forgot how to code properly. :)
I believe it should be OK now. Cheers.