Cloning of lo_message objects
Merge pull request #6 from ventosus/clone_message

Cloning of lo_message objects
For compatibility with MingW-w64, gcc 4.7.1, add LIBRARY line to .def file.

The DLL filename is hard-coded for now.  Build problem discovered by
Karl Svec.
Some changes to support automake-1.13.
Update configure.ac according to autoupdate 2.69.
Update doxygen file according to 'doxygen -u' for doxygen 1.8.1.2.
Fix a doxygen reference due to badly-placed group ending.
support for creating and sending nested bundles
UDP resolve enable in lo_server struct
Move lo_server_thread_pp() prototype to lo_serverthread.h.

Avoid the use of #ifdef in the headers.
Only call getnameinfo() when lo_address_get_hostname() et al are called.

Instead of calling it for every received message.
Merge branch 'udp_resolve_enable'
Resolve lo_address hostname in send_data() if necessary.

Fixes testlo, which was broken in previous commit.
New API to set a server's options, lo_server_set_flags.
One bitfield is currently available - LO_SERVER_DISABLE_COERCION - when set, prevents the dispatch to coerce an input message's arguments.
Update comment for lo_bundle_count().
Add back the lo_bundle_free_messages() function for ABI backward-compatibility.

The function is marked as obsolete, but its symbol must remain exported.
Add a test for a simple case of nested bundles.
Add new bundle functions to export list.
Expose refcount mechanism publicly and use it for freeing.

This allows code to make use of reference counting to keep track of
message and bundle object ownership.  Since lo_message_free(),
lo_bundle_free() and lo_bundle_free_recursive() decrement the counter
and check it before freeing, previous code will work as expected,
however if lo_message_incref() or lo_bundle_incref() are used, actual
free will be deferred until no more references exist.

User code should call always the corresponding lo_message_incref() or
lo_bundle_incref() function when these objects are stored.
Add new lo_server_set_flags() function to .def file.