Provide a mechanism to hide thumb

Fixes #5.

Fix Podspec

v0.1.1

Podspec version 0.1.1

Properties attributes changes

Default property attribute 'assign' was either assumed or not appropriate for non-GC object. Explicit attributes added.

Dynamic Resizing

Controls will resize properly when dimensions (frame) are changed.

Introducing TGPDiscreteSlider and TGPCamelLabel

TGPCamelSlider: a fully customizable discrete slider, not unlike UISlider.
TGPCamelLabel: an animated UILabel set, perfect to place above a TGPCamelSlider.

Works on iOS 7 and up, with fancy @IBInspectable in iOS 8.

Recommended use of pod --version 0.36.0.beta.1 on iOS 8,