Merge pull request #283 from htlxyz/v3

modify code
added files for win32
Merge pull request #284 from htlxyz/v3

modify app background foreground event
Merge pull request #285 from htlxyz/v3

add sprite3d resource
cleanup
added timestamp in ApkBuilder
added project path in ApkBuilder when build native
modified use of timestamp
added project path in commands of ApkBuilder