9.8.0: I/O

Bugfixes

• Fixed io.streams.MemoryOutputStream to behave like files when writing
  beyond stream end: Content is padded with "\0".
  (@thekid)
• Fixed io.FileUtil::write() to overwrite open files' contents instead
  of simply appending the bytes given
  (@thekid)
• Fixed io.File::truncate() to retain the file offset on Windows, this
  way behaving the same as Unix systems.
  (@thekid)

Features

• Changed io.streams.FileOutputStream to implement Seekable interface
  (@thekid)
• Added io.FileUtil::append() to complement the write() method.
  (@thekid)
• Added optional bytes arg to io.streams.MemoryOutputStream constructor
  (@thekid)
• Added read() and write() methods to io.FileUtil as replacements
  for getContents() and setContents()
  (@thekid)
• Added io.streams.MemoryOutputStream::bytes() method w/o get prefix
  (@thekid)
• Added io.TempFile::persistent() method to keep temporary files even
  after they are garbage-collected
  (@thekid)
• Added destructor to file ensuring file handles are closed when io.File
  are garbage-collected
  (@thekid)
• Added io.TempFile::containing() method to easily create temporary
  files and write content to them in one step
  (@thekid)
• Merged PR #204: Deprecate util.PropertyManager - @thekid