Added required dependencies on opm-parser and CJSON
Added very simple parser test to check a parser can be instantiated and a simple file parsed
Set the boost version requirement to 1.44 - and added cJSON dependency
Removed explicit cJSON dependency from opm-core
Added CJSON_INCLUDE_DIRS to OPM_PARSER_INCLUDE_DIRS
Raised the opm-core boost dependency to 1.44 to reflect parser requirement
Merge pull request #433 from joakim-hove/require-opm-parser

Require opm parser
Merge remote-tracking branch 'upstream/master' into opm-parser-integrate
Merge remote-tracking branch 'upstream/master' into opm-parser-integrate
Merge remote-tracking branch 'upstream/master' into opm-parser-integrate
Merge remote-tracking branch 'upstream/master' into opm-parser-integrate
Merge remote-tracking branch 'upstream/master' into opm-parser-integrate
dune.module: specify dependency on opm-parser

this is tested in cmake, but dunecontrol was unware of it up to
now. this depends on OPM/opm-parser#67
Merge remote-tracking branch 'upstream/master' into opm-parser-integrate
Merge pull request #443 from andlaus/parser-integrate-dunecontrol_support

dune.module: specify dependency on opm-parser
OpmFind.cmake: prevent multiple calls to the same module in the same run

this prevents to check for the same module more than once in the same
cmake run and should thus speed things up a bit as well as make the
output a bit cleaner. For this I assumed that the ${name}_FOUND cmake
variable does not get cached, which it seems like it does not...
cmake: make sure all calls to message() exhibit a type
OpmFind.cmake: also check for CAPITALIZED found variables

thanks to @rolk for catching this
Merge remote-tracking branch 'upstream/master' into opm-parser-integrate
Merge remote-tracking branch 'upstream/opm-parser-integrate' into opm-parser-integrate