added codes to manage settings
added classes for setting page view and controller
added setting class and property file to persist user's selected setting
updated with changes from the master branch
fixed bug on the nextExample button. All examples should be shown up to
the limit set by the user. Default limit is 2147483647

Updated the setting class to save user's setting in the persistent
folder
synchronized changes with the master
Merge pull request #63 from CS673/manageSettings2

Manage settings2