Improve library version handling

[vak-oskh]

The main idea is to provide the ability to understand from third-party applications which a class method can be used depending on resiprocate library version.

I am upgrading the resiprocate library for my code from version 1.9.2 to master (possibly 1.13.0) and found the issue: resip::SipMessage::getTransport() vs resip::SipMessage::getReceivedTransportTuple(). I think there will be more )

The PR changes allows to include the header <resip/version.h> header and find the library version by the defined variable RESIPROCATE_VERSION_NUMBER or function RESIPROCATE_VERSION_PREREQ(maj, min, patch).
For example,

const resip::Tuple &tuple = 
#ifdef RESIPROCATE_VERSION_PREREQ(1,13,0)
   *sipMsg.getReceivedTransportTuple();
#else // RESIPROCATE_VERSION_1_9_2
   sipMessage.getReceivedTransport()->getTuple();
#endif

Meanwhile, the resiprocate library staff can use the header <version.h> with the defined variable HAVE_VERSION_H for any cases where the version number is required.

P.S. The idea was borrowed from the OpenSSL library with the definition of OPENSSL_VERSION_NUMBER.