Fix position issues caused by calculateHeight: true

Fixes issues 254, 258 and probably 283
---
When calculateHeight is true, containerSize was set to the calculated height, rather than the width. 

I refactored the code to avoid the double assignment and assign containerSize to height, only for vertical mode (!isH)

dev/idangerous.swiper.js

@@ -647,9 +647,10 @@ var Swiper = function (selector, params) {
  if (!isH) wrapperHeight+=_this.slides[i].getHeight(true);
  }
  var slideHeight = slideMaxHeight;
- if (isH) var wrapperHeight = slideHeight;
- containerSize = _this.height = slideHeight;
- if (!isH) _this.container.style.height= containerSize+'px';
+ _this.height = slideHeight;
+
+ if (isH) wrapperHeight = slideHeight;
+ else containerSize = slideHeight, _this.container.style.height= containerSize+'px';
  }
  else {
  var slideHeight = isH ? _this.height : _this.height/params.slidesPerView ;