Rename all *.c files to *.cpp, to avoid having to declare extern "C" and so on

diff --git a/iodevices/unix_terminal.c b/iodevices/unix_terminal.cpp
similarity index 100%
rename from iodevices/unix_terminal.c
rename to iodevices/unix_terminal.cpp

diff --git a/sim/config.c b/sim/config.cpp
similarity index 100%
rename from sim/config.c
rename to sim/config.cpp

diff --git a/sim/iosim.c b/sim/iosim.cpp
similarity index 100%
rename from sim/iosim.c
rename to sim/iosim.cpp

diff --git a/sim/memory.c b/sim/memory.cpp
similarity index 100%
rename from sim/memory.c
rename to sim/memory.cpp

diff --git a/sim/sim0.c b/sim/sim0.cpp
similarity index 100%
rename from sim/sim0.c
rename to sim/sim0.cpp

diff --git a/sim/sim1.c b/sim/sim1.cpp
similarity index 100%
rename from sim/sim1.c
rename to sim/sim1.cpp

diff --git a/sim/sim1a.c b/sim/sim1a.cpp
similarity index 100%
rename from sim/sim1a.c
rename to sim/sim1a.cpp

diff --git a/sim/sim2.c b/sim/sim2.cpp
similarity index 100%
rename from sim/sim2.c
rename to sim/sim2.cpp

diff --git a/sim/sim3.c b/sim/sim3.cpp
similarity index 100%
rename from sim/sim3.c
rename to sim/sim3.cpp

diff --git a/sim/sim4.c b/sim/sim4.cpp
similarity index 100%
rename from sim/sim4.c
rename to sim/sim4.cpp

diff --git a/sim/sim5.c b/sim/sim5.cpp
similarity index 100%
rename from sim/sim5.c
rename to sim/sim5.cpp

diff --git a/sim/sim6.c b/sim/sim6.cpp
similarity index 100%
rename from sim/sim6.c
rename to sim/sim6.cpp

diff --git a/sim/sim7.c b/sim/sim7.cpp
similarity index 100%
rename from sim/sim7.c
rename to sim/sim7.cpp

diff --git a/sim/simctl.c b/sim/simctl.cpp
similarity index 100%
rename from sim/simctl.c
rename to sim/simctl.cpp

diff --git a/sim/simfun.c b/sim/simfun.cpp
similarity index 100%
rename from sim/simfun.c
rename to sim/simfun.cpp

diff --git a/sim/simglb.c b/sim/simglb.cpp
similarity index 100%
rename from sim/simglb.c
rename to sim/simglb.cpp

diff --git a/sim/simint.c b/sim/simint.cpp
similarity index 100%
rename from sim/simint.c
rename to sim/simint.cpp