[Update, v1.1] Create new Basketball event

- Added new team's table and generated model
- Basketball new page now has select element and obtains data directly
from team's table data from DB
- Added if statement on index page to prevent ghost <br/> if team1
string is empty
- Added an empty TD message on index if there are no basketball events
recorded in DB

Planned change : Add JavaScript validation on certain fields in the
Basketball new page.