pandoc seems to need an extra line at the top of a markdown file.
Add a function to provide library version information at run-time.

Also adds a much-needed compile-time DEBUG preprocessor flag.
Remove specific mentions of .lo and .la files from .gitignore.
Update year in copyright notices and reference AUTHORS file.
Always include time.h in server.c.
premake: replace LO_SO_VERSION in config.h
Check whether -Qunused-arguments can be given to C++ compiler.
Update doxygen configuration for doxygen 1.8.5.

Changes made automatically by running `doxygen -u'.
Fix typo in lo_version() documentation.
Fix error in doxygen \file line in lo_serverthread.h.
Add a C++ usage example.
Update more copyright years.
Add a check for a specific config.sub/config.guess that causes errors for Android under MSYS/MingW.
Add a C++ wrapper for lo_version().
Add C++ wrappers for lo_timetag_now() and LO_TT_IMMEDIATE.
Add cpp_example to .gitignore.
Update version to 0.28 and update LO_SO_VERSION accordingly.

Two functions (lo_bundle_get_timestamp, lo_version) have been added
since 0.27, so 'current' gets a bump.
Windows: Add lo_server_enable_queue to exported DLL symbols.
Patch for missing #include for FreeBSD from SF user nemysisbsd.
Add several configure options for the sake of modularity.

This adds the following configure options:

  --disable-tests         Disable compiling test programs
  --disable-network-tests Disable compiling network-based tests
  --disable-tools         Disable compiling tools
  --disable-examples      Disable compiling examples

Additionally, it adds some code to configure.ac to print out some
information about the current build.  The --disable-network-tests flag
is not yet implemented in testlo.