added support for dependant subtypes, seems to work well with ones like the...

added support for dependant subtypes, seems to work well with ones like the power conditioning example, if you try to give a specific type, ie. {x:real|x>5}, cvc is not able to prove unless you provide a witness of the type. Currently translates from pvs style typing to the cvc style so that user only needs to know one way, the pvs way is cleaner

git-svn-id: https://groke.mcmaster.ca/svn/grad/colin/trunk/TableTool@6559 57e6efec-57d4-0310-aeb1-a6c144bb1a8b