Creation of jniwrapper.cpp. Modification of ocvstitcher.cpp.
prepare ocv stitcher refactor...
Merge remote-tracking branch 'origin/testing_ocvstitcher' into testing

Conflicts:
	jni/ocvstitcher.cpp
	src/fr/ensicaen/panandroid/stitcher/StitcherWrapper.java
Added openCV stitcher class sources.