1. Do not inherit from ZipHandler
2. Previously, the following computations have been happening:
- Map<String, ZipEntryDescription> -> Map<String, EntryInfo> (see createEntriesMap)
- Map<String, EntryInfo> -> VirtualFile tree
But the intermediate computations (Map<String, EntryInfo>)
were only used in the constructor, thus they've eliminated in this commit
3. Unclear magic semantic from `getOrCreate` with "/" and "\\" (copy-pasted from CoreJarHandler)
has been replaced with `normalizePath`
Denis.Zharkov
979f5e8443