Imported dwigand's changes: new buffers can request notification for old IUs

ipaacalib/cpp/CMakeLists.txt

ipaacalib/cpp/include/ipaaca/ipaaca.h

ipaacalib/cpp/ipaaca.pb.cc

ipaacalib/cpp/ipaaca.pb.h

ipaacalib/cpp/src/Makefile

ipaacalib/cpp/src/Makefile~

ipaacalib/cpp/src/ipaaca-receiver

ipaacalib/cpp/src/ipaaca-sender

ipaacalib/cpp/src/ipaaca-test-main.cc

ipaacalib/cpp/src/ipaaca.cc

ipaacalib/cpp/test/src/Makefile

ipaacalib/cpp/test/src/Makefile~

ipaacalib/cpp/test/src/testipaaca.cc

ipaacalib/java/src/ipaaca/IUResendFailedException.java

ipaacalib/java/src/ipaaca/Initializer.java

ipaacalib/java/src/ipaaca/InputBuffer.java

ipaacalib/java/src/ipaaca/OutputBuffer.java

ipaacalib/java/src/ipaacademo/TestListener.java

ipaacalib/java/src/ipaacademo/TextPrinter.java

ipaacalib/proto/ipaaca.proto