JSON Schema is nothing close to XSD

Remove reference.
Update references to JSON Reference, JSON Pointer

JSON Reference: 2 -> 3
JSON Pointer: 3 -> 7
Split example schemas section

There are JSON Schema "official" schemas and others.
Merge pull request #53 from fge/gh-pages

First batch of small changes
Merge pull request #54 from geraintluff/gh-pages-working

Geraint Luff (3):
      Put an example on the main page
      Update examples to draft v4
      "minimum" is inclusive by default, not exclusive
examples.html: update gists

* Add "$schema" everywhere.
* Add "description" as well.
examples.html: more descriptive introduction to the first schema
Minor changes

* Add a supposedly missing <em></em>.
* Fix a little point of grammar.
* Fix an extraneous space.

Minor, I tell you.
examples.html: add two constraints to tags

Require that there be at least one tag, and that all tags must be unique.
Merge pull request #55 from fge/gh-pages

Some minor updates to the example page
Add a new, more complex example
Refer to the two examples in index.html

Also rename examples.html to example.html.
Merge pull request #58 from fge/gh-pages-orig

Another schema example
Merge branch 'gh-pages' of https://github.com/json-schema/json-schema into gh-pages

Conflicts:
	example.html
Second example