Updated README.

Author: kgaidis

README.md

@@ -3,7 +3,7 @@
 
 FZAccordionTableView transforms your regular UITableView into an accordion table view. The table view section headers are used as tappable areas to collapse rows - just tap a section header, and all of the rows under that section will open below the header and viceversa.
 
-The module is made to be very easy to use and no modifications are necessary to achieve the default behaviour. The table view and the section header has to subclass the classes in this module.
+The module is made to be very easy to use and no modifications are necessary to achieve the default behaviour. Just build a table view with cells and section headers and subclass the classes in this module.
 
 ### FZAccordionTableView Class:
 
@@ -12,37 +12,37 @@ The module is made to be very easy to use and no modifications are necessary to
 
 @property (nonatomic) BOOL allowMultipleSectionsOpen;
 @property (nonatomic) BOOL keepOneSectionOpen;
-@property (strong, nonatomic) NSSet *initialOpenSections;
-@property (strong, nonatomic) NSSet *sectionsAlwaysOpen;
+@property (strong, nonatomic, nullable) NSSet <NSNumber *> *initialOpenSections;
 @property (nonatomic) BOOL enableAnimationFix;
 
 - (BOOL)isSectionOpen:(NSInteger)section;
 - (void)toggleSection:(NSInteger)section;
+- (NSInteger)sectionForHeaderView:(UITableViewHeaderFooterView *)headerView;
 
 @end
 ~~~
 
+### FZAccordionTableViewHeaderView Class:
+~~~objective-c
+@interface FZAccordionTableViewHeaderView : UITableViewHeaderFooterView
+@end
+~~~ 
+
 ### FZAccordionTableViewDelegate Protocol:
 ~~~objective-c
 @protocol FZAccordionTableViewDelegate <NSObject>
 
+- (BOOL)tableView:(FZAccordionTableView *)tableView canInteractWithHeaderAtSection:(NSInteger)section;
+
 - (void)tableView:(FZAccordionTableView *)tableView willOpenSection:(NSInteger)section withHeader:(UITableViewHeaderFooterView *)header;
 - (void)tableView:(FZAccordionTableView *)tableView didOpenSection:(NSInteger)section withHeader:(UITableViewHeaderFooterView *)header;
+- 
 - (void)tableView:(FZAccordionTableView *)tableView willCloseSection:(NSInteger)section withHeader:(UITableViewHeaderFooterView *)header;
 - (void)tableView:(FZAccordionTableView *)tableView didCloseSection:(NSInteger)section withHeader:(UITableViewHeaderFooterView *)header;
 
 @end
 ~~~
 
-### FZAccordionTableViewHeaderView Class:
-~~~objective-c
-@interface FZAccordionTableViewHeaderView : UITableViewHeaderFooterView
-
-@property (nonatomic, readonly) NSInteger section;
-
-@end
-~~~ 
-
 ## How To Use?
 ### Steps: