Merge pull request #2 from luciofm/master

Better positioning of items on the grid and force column number.
Merge pull request #3 from luciofm/master

Handle the case were there is no RowInfo yet.
Minor adjustments
Adds support for click events on list
Removes unnecessary call
Minor changes
Adds toggle for reordering elements
Sanity check in setAllowReordering for null adapter
Use 2 Pools for View reuse.
Log getView and getActualView
Add toggle for View debugging.
Set layout params on child views