Closes #293

Prefix all classes with rz- #272

Prefix all classes with rz- to avoid conflicts with other CSS classes (e.g. from an other library)

Prefix all classes with rz- #272

This has been broken by previous commit that adds the RTL support.

feat(RzSlider): Add RTL support

Added rightToLeft option which will reflow slider from right to left ( or switch vertical if

vertical: true)

Fixed number precision when draggableRange=true

When there was set options.precision>0 (non-zero fraction part)
and moved a range there was a issue with number rounding on both
ends of selected range. Sometimes numbers had small value at far fraction.

It can be reproduced with live demo by setting, for example:
  minValue: 3.6,
  maxValue: 5.8
  floor: 0,
  ceil: 10
  step: 0.1,
  precision: 1,
  draggableRange: true

It's possible to produce value, e.g: 6.2999999999... but used precision
expects to see rounded value: 6.3.

2.9.0 Release

feat(rzSliderOptions): Change rzSliderOptions to use expression binding

Switch from using two-way binding for rzSliderOptions to using expression binding. Using expression
binding enables more complex use cases such as using the return value of a function as an options
object.

Closes #265.

Simplified expression that was potentially unsafe for minification

The final goal is to split tests in several files

feat(pointerColor): Adding feature for dynamic pointer color.

Changing the color of the pointer of a slider based on the value. Just pass a function to the
'pointerColor' option which returns a valid CSS color definition (either hex or named) and let the
pointer shine in the brightest colors

feat(translate): Pass a label string as third arg to the translate function to differentiate the lab

Closes #252