Rev version in extension schemas for 1.1.1 release

- Change version attribute on the root “xs:schema” element to 1.x.1
- Change <version> annotation inside the “xs:appinfo” element to 1.x.1
- <date> annotation inside the “xsi:appinfo” element to 5/1/14
Merge branch 'Sample-changes-for-1.1.1' of https://github.com/STIXProject/schemas.git into Sample-changes-for-1.1.1
Update samples to new version number 1.1.1