ENH: Reduce input images sizes for BasicFiletrs "TextureFunctor" tests, to suppress timeout testing.

ENH: Add CMake option(OTB_USE_EXTERNAL_EXPAT [OFF] ) to select or not the system lib EXPAT or the internal OTB directory.

ENH: Finished the optimized convolution algorithm. Added test to compare with the classical convolution.

ENH: Added the ability to choose the boundary condition for the convolution. Changed the testing boundary condition.

BUG: Kml correction for windows : add -DUNICODE and -D_UNICODE compilation option. Add stdafx files to compilation

#include <winsock2.h> by
#include <winsock.h>
Bug reported on libkml google.

BUG: Add ADD_DEFINITIONS(-DCOMPILED_FROM_DSP) for Visual platform because don't know memmove and bcopy functions.
Tested on Visual 7.1 (.NET 2003)

BUG: The SurfaceAdjancecyEffect6SCorrectionSchemeFilter bug with small shiny strips appearing when using multithreading is fixed.

BUG: PB with unistd on Visual platform => correction: unistd.h on "unix" and io.h and process.h faot WIN32 (except for Cygwin)

OTB find expat lib on th esystem and try to compile a specific program. Il compilation no succeess, we decided to compile the expat on OTB/Utilities.

STYLE: Suppression of Warning : warning: comparison with string literal results in unspecified behaviour ...

BUG: Because of neighborhood, this filter should not derive from InPlaceImageFilter. This introduces bugs for instance with the multi-threading support.