Changed the check_cxx_source_compiles() in Findopm-parser to look for Deck.hpp; Parser.hpp had uneccasary complicated interaction with cJSON
Merge pull request #432 from joakim-hove/find-opm-parser

CMAKE: check_cxx_source_compiles() in Findopm-parser to look for Deck.hpp
Merge branch 'master' into devel