Improve error information about parse errors

[Munter]

I've tried improving on the details of the error messages that CSSOM will throw.

The changes try to do the following:

• Throw new Error instead of strings
• Keep track of line and char numbers (1-indexed to match most editors)
• Write line and chars numbers in error.message
• Add line and char numbers to error as properties
• Added the stylesheet in the state of parsing that it was in when the error occurred

I've changed the one thrown SyntexError with Error, since the SyntaxError seems to be reserved for node internals during failed eval().

[NV]

Merged, thanks!

[Munter]

And thank you for a quick reaction.

Any idea on when you'll release the next version? I'd like to improve my tools with this functionality asap :)

[NV]

Just published cssom@0.2.4.

[Munter]

That's great. Thank you very much

[NV]

Char is zero-based numbered and line is 1-based. Doesn’t look consistent to me.

[Munter]

You are right. Just double checked it and made a fix