added file name to donwload path
refactoring
check filename when download
added argument validation
add unittest model.dcase
added file name to download path
Merge pull request #132 from STerao/add_unittest_model_dcase

add unittest model.dcase
Merge pull request #133 from assureit/download_with_name

added file name to download path
add unittest model.file
Merge pull request #134 from STerao/add_unittest_model_file

add unittest model.file