Bug fix, spacing fixes, EOF php tag

Fixed bug in RetrieveAllPages where number of results returned is incorrect (it keeps cumulatively adding more number of results)

cvent_api_session.txt is now pulled from the library's directory, as opposed to the running-script's directory

Removed EOL whitespace; Fixed a single instance of extraneous spacing w/ a BOL tab
    Sorry if these bug you, my git is configured to automatically fix  this stuff :-)

Added end of script ?> tag to the end of the file