Merge branch 'master' of https://github.com/SDSMTGDT/Physicist
Adding XSD schemas to simplify and control content in the physicist files. Addition of XSLT files allows for the creation of prefab templates to further simplify map documents.
Fix of detected whitespace
Merge pull request #35 from chfeltman/XMLSchema

Addition of Xml schemas
Merge of ScreenManager with the XML Schema changeset. Found bug in XSLT 'mario' transform requarding default attributes