Bump version number to 0.18-dev
Bump version number to 0.18-dev

BenoitPerrot/oce,tpaviot/oce,BenoitPerrot/oce,tpaviot/oce,BenoitPerrot/oce,tpaviot/oce,BenoitPerrot/oce,tpaviot/oce,BenoitPerrot/oce,tpaviot/oce