quickstart - buildQueriesFromTemplate bug fix

The same %page attribute was being added to the appPageGet request
multiple times. That bug is fixed, PLUS if the attribute is already in
the list of attributes to be fetched, it won't double-add.
quickstart - bug fix

The showPageContent function was sometimes no executing at the right
time (before the ping). had to due with passing the entire tagObj from
the fetchPageContent into buildQueriesFromTemplate which used the params
passed in for the callback on the ping. Sanitizing the data passed into
buildQueriesFromTemplate solved the problem.