Update style4.css, pic3.png, style.css, style3.css, login.jpg, logo1.png,...

Update style4.css, pic3.png, style.css, style3.css, login.jpg, logo1.png, pic.png, pic2.png, logo.png, logo2.png, background1.jpg, background.jpg, StudentTimetable.html, LecturerTimetable.html, Homepage.html, login.html, LoginRegisterstyle.css, register.html Deleted t4.jpg, t3.jpg, style2.css, styl.css, stylee.css, t1.jpg, t2.png, t5.png, images.jpg, html.html, TimetablePage.html, README.md, LoginRegister.html, Homepage1.html