imageFromURL(url: String, placeholder: UIImage, fadeIn: Bool = true, closure: ((image: UIImage?) -> ())? = nil)
// Fetches an image from a URL. The cached image is returned if available, otherise the placeholder is set until the backaground fetch returns a proper image.

UIImage.imageFromURL(url: String, placeholder: UIImage, shouldCacheImage: Bool = true, closure: (image: UIImage?) -> ()) -> UIImage?
// Fetches an image from a URL. If caching is set, it will be cached by NSCache for future queries. The cached image is returned if available, otherise the placeholder is set. When the image is returned, the closure gets called.

UIImage(color:UIColor, size:CGSize)
// Creates an image from a solid color
UIImage(gradientColors:[UIColor], size:CGSize) 
// Creates an image from a gradient color
func applyGradientColors(gradientColors: [UIColor], blendMode: CGBlendMode) -> UIImage 
// Applies a gradient overlay to an image
UIImage(startColor: UIColor, endColor: UIColor, radialGradientCenter: CGPoint, radius:Float, size:CGSize)
// Creates an image from a radial gradient

UIImage(text: String, font: UIFont, color: UIColor, backgroundColor: UIColor, size:CGSize, offset: CGPoint)
// Creates an image with a string of text

UIImage(fromView view: UIView)
// Creates an image from a UIView 

func hasAlpha() -> Bool
// Returns true if the image has an alpha layer
func applyAlpha() -> UIImage 
// Returns a copy(if needed) of the image with alpha layer 
func applyPadding(padding: CGFloat) -> UIImage 
// Returns a copy of the image with a transparent border of the given size added around its edges
func imageRefWithPadding(padding: CGFloat, size:CGSize) -> CGImageRef 

func crop(bounds: CGRect) -> UIImage 
// Crops an image to a new rect
func cropToSquare() -> UIImage 
// Crops an image to a centered square
func resize(size:CGSize, contentMode: UIImageContentMode = .ScaleToFill) -> UIImage 
// Resizes an image

func roundCorners(cornerRadius:CGFloat) -> UIImage
// Rounds corners of an image
func roundCorners(cornerRadius:CGFloat, border:CGFloat, color:UIColor) -> UIImage
// Rounds corners of an image with border
func roundCornersToCircle() -> UIImage
// Rounds corners to a circle
func roundCornersToCircle(#border:CGFloat, color:UIColor) -> UIImage
// Rounds corners to a circle with border

func applyBorder(border:CGFloat, color:UIColor) -> UIImage {
// Adds a border