Update README
Update README

- Add the new version of the Cocoapods
- Add the line for set the total variable
Vkt0r/AccordionMenuSwift,Vkt0r/AccordionMenu,Vkt0r/AccordionMenu,mariella725/accordionupdate,mariella725/accordionupdate,Vkt0r/AccordionMenuSwift,mariella725/accordionupdate,Vkt0r/AccordionMenuSwift,Vkt0r/AccordionMenu,mariella725/accordionupdate,Vkt0r/AccordionMenuSwift