Added new AddChildToEntity action
Created a special SamplePanel for TextComponent
Minor code changes.
Small performance improvement
Index updated to recursively walk through model
Updated Model API
Updated Index Test
Merge pull request #574 from anserran/searchwidget

Index updated to recursively walk through the model, and properly update with ModelEvents
Condition removed from effect
Abstract control structure effect added to be the parent of all control structures
ScriptCall refactored to be a control structure
If effect
If-then-elseif-else
while
bindings
initializer
test updated
Merge pull request #576 from jtorrente/effects-controlstructures

Control structure effects
Group all engine-related objects into Engine control class
Changes after API changed