merge develop

CMakeLists.txt

include/cdo.h

src/CMakeLists.txt

src/Distgrid.cc

src/Ensval.cc

src/Eofcoeff.cc

src/Eofcoeff3d.cc

src/Harmonic.cc

src/Intyear.cc

src/Makefile.am

src/Split.cc

src/Splitdate.cc

src/Splitrec.cc

src/Splitsel.cc

src/Splittime.cc

src/Splityear.cc

src/Timstat.cc

src/cdoStream.cc

src/cdoStream.h

src/cdo_getopt.h