In 3afcce95 commit, I changed the behavior of the combined label for range slider. However, this
broke previous implementation, so this commit add an option to configure this feature. The default
behavior is back as previously: If the slider values are the same, the combined label is 'X - X'

Related to #245

Closes #339

* refactor(stepsArray): Bind rzSliderModel and rzSliderHigh to the actual value

As discussed in #328

Handle slideEnded event as well

Closes #319

* IE8 support

IE8 requires the ability to use the alternative directive syntax : <div rzslider ... ></div>

Fixes #313

* Update for new default template

* New template for IE8 support

* Update for new template

* oops

* Suggested fixes for #314

feat(maxRange): Add a maxRange option

#322

feat(minMaxLimit): Add a minLimit and a maxLimit

Add BoundPointerLabels Option

added new option boundPointerLabels (default: true). If it is false - pointer label will not stick
to the ends of slider.

feat(ticks): Add legend support

This feature enables to display legend under each slider tick.

feat(ticks): Accept numbers for showTicks/showTicksValues

Thanks to this feature, you can display ticks at intermediate positions without setting a fixed step

Closes #273

fix(rz-vertical rz-tick-value): Position long labels on vertical sliders correctly

305

Feat: Allow custom translate function when slider steps are specified