Added new generated public include qca_version.h.
Also add new version DEFINES
  QCA_MAJOR_VERSION
  QCA_MINOR_VERSION
  QCA_PATCH_VERSION
  QCA_VERSION_STR
  QCA_VERSION_CHECK(major, minor, patch)

and new version functions
  const char *qcaVersionStr()
  int qcaMajorVersion()
  int qcaMinorVersion()
  int qcaPatchVersion()