Extract case and solver information

Series of changes to support extraction of case/solver information in OpenFOAM dictionary/JSON formats.

• ENH: checkMesh - added -writeChecks option
• TUT: Added caseInfo function object example
• ENH: Added new caseInfo function object
• ENH: Added new JSONformatter to write Ostream content in JSON format
• ENH: polyMeshCheck - added mesh quality metrics to meshState dictionary
• STYLE: Refactoring use of meshState in {fv|faMesh}
• STYLE: renamed/moved 'data' to 'meshState'