Added two modes for calculating "wrap_contnet" height. Fast mode
calculates height of only visible views. Slow mode calculates height
of all views in adapter. maximum height of all views that were used in 
calculation is considered result.

layout_height attribute.

Conflicts:
	demo/.classpath
	demo/project.properties
	devsmartlib/.classpath
	devsmartlib/src/com/devsmart/android/ui/EqualSpaceLayout.java
	devsmartlib/src/com/devsmart/android/ui/HorizontalListView.java

…d in older versions of Android (like Gingerbread). The scroll positions are erratic (postive and negative values mixed together) even when the user is uniformly scrolling in a single direction. To smoothen this out, I am averaging the last two received x co-ordinates while scrolling. This results in a much smoother scrolling experience on older OS'es and does not adversly effect new OS'es.