LMW-122 Check parameters before queue the operation
LMW-122 Treat optional arguments as actual optionals
LMW-122 AssetListScreenletEntry includes all the attributes
Merge pull request #70 from liferay/LMW-122-all-atributes-in-assetlist

LMW-122 AssetListScreenletEntry should contain all fields of each asset, instead of only the title