Changed include to support wildcards

[davidsonbr]

I felt like the changes to ParseDirectives should be bundled with this commit, feel free to tell me otherwise.

[awilliamson]

ParseDirectives for the last param should always be a table. Even if it just has a single item. I think having string/table isn't nice behaviour.

[awilliamson]

Lots of code blocks like this switching on type. As suggested, keep it as nil or a table. Try and optimise this to a single block, make use of ternary for nil checks etc.

[davidsonbr]

ParseDirectives has been made into a single block.

[awilliamson]

@EpicG Would this break anything you're working on? I remember us chatting about remaking the ParseDirectives to refactor it properly for chaining directive checking.

[Jazzelhawk]

Was testing this a bit and came up with a few things:

You can't have more than two of the same statement, preprocessor.lua:125
err returned from ParseDirectives is a table, can't be concatenated in editor.lua:877
directive_include doesn't work properly when starting with *
Maybe change include directive example to show wildcards

[davidsonbr]

Those are not the same statement, one is singular one is plural
Fixed err
fixed starting with *
Added example to show wildcards

[Jazzelhawk]

I meant when you have two of the same directive, they are going to be overwritten in the directives table.
directives[ directive ] = args
If directive is equal to "include" then what ever was there before is just going to be overwritten.

[davidsonbr]

Ohhhh I see now. gotcha. Will fix that asap.