Outdated syntax in schemaexamples.py

Running schemaexamples.py throws following errors: 

```

/Users/user/dev/schemaorg/software/SchemaExamples/schemaexamples.py:22: SyntaxWarning: invalid escape sequence '\s'
  '[\s\S]*<\s*script\s+type="application\/ld\+json"\s*>(.*)<\s*\/script\s*>[\s\S]*',
/Users/user/dev/schemaorg/software/SchemaExamples/schemaexamples.py:403: SyntaxWarning: invalid escape sequence '\S'

```