Add cpp and java examples

[cchampet]

in the examples folder:

CMakeLists.txt

java/lsFile.java
java/lsFolder.java
java/lsSequence.java

cpp/lsFile.cpp
cpp/lsFolder.cpp
cpp/lsSequence.cpp

python/lsFile.py
python/lsFolder.py
python/lsSequence.py