CodeMirror: XML mode

This is my XML parser, based on the original:

• No html mode - this is pure xml
• Illegal attributes and element names are errors
• Attributes must have a value
• XML declaration supported (e.g.: <?xml version="1.0" encoding="utf-8" standalone="no" ?>)
• CDATA and comment blocks are not indented (except for their start-tag)
• Better handling of errors per line with the state object - provides good infrastructure for extending it

What's missing:

• Make sure only a single root element exists at the document level
• Multi-line attributes should NOT indent
• Start tags are not painted red when they have no matching end tags (is this really wrong?)

MIME types defined: application/xml, text/xml.

@author: Dror BG (deebug.dev[at]gmail.com)

@date: August, 2011

@github: https://github.com/deebugger/CodeMirror2

MIME types defined: application/xml, text/xml.