[TypeCast] when allowing nullable parameter, return null
Merge pull request #290 from xuzhang/dev

[TypeCast] when allowing nullable parameter, return null
[bug fixing] TDIS-5531, TDIS-5534

parsing correct tizen:application "id & package" attribute on config.xml
dymanic adding current running application and package on the list
Merge pull request #292 from zivchang/next

[bug fixing] TDIS-5531, TDIS-5534