Naming inconsistency for inlineTagProcessor

[martinsik]

I've noticed that README.md mentions among "Processors" inlineTagsProcessor but this doesn't exist.

Correct name is inlineTagProcessor so it's the only one without plural "tags" in its name even though its filename is inline-tags.js.

So README.md should be probably updated but it looks like the intended name was really inlineTagsProcessor. But if I change its name in inline-tags.js from inlineTagProcessor to inlineTagsProcessor this would be a breaking change because a lot of other code is already using this name.