Update README.md

README.md

-# book management system 1
+# book management system 
+
+A efficient and simple website for book management.
+
+**The operation that users can perform:**
+1.Download ebooks
+2.Request for ebooks
+3.Comment on ebooks
+4.Change login password
+5.Upload ebooks
+
+**The operation that Admin can perform:**
+1.Download ebooks
+2.Read request for ebooks
+3.Read comment on ebooks
+4.Change login password
+5.Upload ebooks
+6.Number of students
+7.Registeration of book by student
+
+