Update based on requirements given on Feb.25.2014, sprint1

1. Select or manually input the number of users when upload CSV file of
data.
2. Open or close tooltip message box in graph.
3. Detele points manually on the map.
4. Reset the size of grid on webpage.
5. Rewrite params.php and related pages, so that config and parameters
can be set in params.php for global use.