Merge pull request #52 from pandamicro/lua-vm-3.1.1

Update AssetsManagerTest
Updates COCOPLAY_UTILS_CLASS to point ot `com.chukong.cocoplay.utils.FileUtils`
Merge pull request #53 from pandamicro/lua-vm-3.1.1

Feature #4977: Support resume download for AssetsManager
Add CocoPlayVM project
Merge pull request #54 from lmskater/add-cocoplayvm

Add CocoPlayVM project
Merge pull request #54 from pandamicro/v3_assets_manager

Sync Cocos2d-x v3 to v3_assets_manager
Issue #5570: Use new manifest url to resolve conflict
Merge branch 'lua-vm-3.1.1' into v3_assets_manager