Merge pull request #109 from tpaviot/tp/oce-0.12-update

Updated Linux/OSX SWIG files for oce-0.12
Call find_package(OCE) to find OCE paths
Also call find_package(OCE) in GEOM and SMESH CMakeLists.txt
By default, only wrap modules which have been compiled by OCE

OCE 0.12 exports the new OCE_ALL_BUILT_MODULES variable for this purpose.