Feature request: Ability to handle self-closing tags and CDATA in non-XML mode

[patrick-steele-idem]

For my use case I needed support for a hybrid parser that would allow for XML constructs to be recognized in HTML code. After looking at the source code I felt that adding more options could provide more fine-grained control over parsing without adding too much complexity to the code. Please review my Pull Request which added two new options:

• recognizeSelfClosing: If set to true then self-closing tags will result in the tag being closed even if xmlMode is not set to true
• recognizeCDATA: If set to true then CDATA text will result in the ontext event being fired even if xmlMode is not set to true

In theory, xmlMode could be used as a way to control the more fine-grained options, but I wanted to minimize code change.