Update ACFloatingTextfield.swift
Update ACFloatingTextfield.swift

`ACFloatingTextfield-Swift` doesn't works while using it with Xcode 8.2.1, Fixed this bug and Optimise the code.
 Added @IBInspectable, to design themselves when added to the storyboard.
ErAbhishekChandani/ACFloatingTextfield,ErAbhishekChandani/ACFloatingTextfield