finished pxnVaultLink class - still needs testing, but works
changed how pxnVault class works - cleaning up a bit more
  added Preload functions
  added MakePayment() function

git-svn-id: http://pxncommon.googlecode.com/svn/trunk@26 f5fbd6b6-c213-558c-f92f-5ab434f62466