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

orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB