zxtune-android: fix crash on unknown length file download.
zxtune-android: use singleton factory for vfs root.
zxtune-android: fix code analysis warnings.
zxtune-android: fix possible threading problems.
zxtune-android: fix analysis check warnings.
zxtune-android: initial version of non-caching ftp.modland.com integration.
zxtune-android: implement caching for modland catalog.
zxtune-android: rework modland integration. Collections support.
zxtune-android: icon for modland source.
zxtune-android: fix parsing of remote modland catalog with html-encoded entries.
zxtune-android: fix selection of non-letter categories in modland cache database.
zxtune-android: support browser by format in modland catalogue.
zxtune-android: cleanup code of modland source.
zxtune-android: russian translation for modland vfs source.
zxtune-android: cancel browser loading on current dir change.