Added items to EMAccordionSection.h, modified formal protocol

1.Added items to EMAccordionSection.h instead of numberOfItems;
2. Added - (void) tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath; to the formal
protocol;
3. Improved - (UIView *) tableView:(UITableView *)tableView
viewForHeaderInSection:(NSInteger)section;
3. Added
- (void) setHeaderHeight:(CGFloat)height;
- (void) setRowHeight:(CGFloat)height;
to EMAccordionTableViewController in order to manage header and row
heights;

TODO:
Manage the arrows;