Log Message:
librevenge: updated to 0.0.5

librevenge 0.0.5
- Fix a bunch of issues discovered by oss-fuzz.
- Require C++11 for building.
- Modernize the code a bit.
- Fix assignment of RVNGString from a C String. The previous code would
  append to the current content instead of replacing it.
- When appending a characer to an RVNGString (i.e., using the char overload of
  append()), don't validate the character. Some libraries use this
  function to construct an RVNGString from UTF-8 code points.
- Drop outdated MSVC project files.
- Extend API documentation a bit.
- Emit viewBox attribute for SVG output to fix user unit to ensure
  proper scaling.
- More fixes for GDB pretty printers.