Merge branch 'feature-functionObjects' of develop.openfoam.com:Development/OpenFOAM-dev-OpenCFD into feature-functionObjects

- Allows generation of images (currently PNG files) during the run
- ... or afterwards by invoking the execFlowFunctionObjects utility
- Wrapper around VTK functionality
- Support for objects:
  - text
  - points (glyphs: sphere, arrow)
  - lines (tubes)
  - surfaces (wireframe, shaded, combination)
- Colour using:
  - user-defined
  - field values (several colour maps availale)
- For image sequences:
  - dynamic views (camera movement)
  - objects can appear/disappear using opacity
- Building
  - VTK dependency v6+
  - satisfied using ParaView from ThirdParty directory
  - or separate VTK installation

- Allows generation of images (currently PNG files) during the run
- ... or afterwards by invoking the execFlowFunctionObjects utility
- Wrapper around VTK functionality
- Support for objects:
  - text
  - points (glyphs: sphere, arrow)
  - lines (tubes)
  - surfaces (wireframe, shaded, combination)
- Colour using:
  - user-defined
  - field values (several colour maps availale)
- For image sequences:
  - dynamic views (camera movement)
  - objects can appear/disappear using opacity
- Building
  - VTK dependency v6+
  - satisfied using ParaView from ThirdParty directory
  - or separate VTK installation

- New boundaryData surface writer
- Moved templated code into separate files
- Output filenames written to functionObjectState dictionary
- Ensight surface writer now supports a 'collate times' option [mattijs]
- Nastran surface writer updated based on user feedback

- New boundaryData surface writer
- Moved templated code into separate files
- Output filenames written to functionObjectState dictionary
- Ensight surface writer now supports a 'collate times' option [mattijs]
- Nastran surface writer updated based on user feedback

Properties stored in state dictionary:
- Moment coefficient: Cm
- Drag coefficient: Cd
- Lift coefficient: Cl
- Front lift coefficient: Cl(f)
- Rear lift coefficient: Cl(r)

Properties stored in state dictionary:
- Moment coefficient: Cm
- Drag coefficient: Cd
- Lift coefficient: Cl
- Front lift coefficient: Cl(f)
- Rear lift coefficient: Cl(r)

Properties stored in state dictionary:
- normalForce
- tangentialForce
- porousForce
- normalMoment
- tangentialMoment
- porousMoment

Properties stored in state dictionary:
- normalForce
- tangentialForce
- porousForce
- normalMoment
- tangentialMoment
- porousMoment

Properties stored in state dictionary:
- minimum value: min<identifier>
- position of minimum value: min<identifier>_position
- processor ID of minimum value: min<identifier>_processor
- maximum value: max<identifier>
- position of maximum value: max<identifier>_position
- processor ID of maximum value: max<identifier>_processor

Properties stored in state dictionary:
- minimum value: min<identifier>
- position of minimum value: min<identifier>_position
- processor ID of minimum value: min<identifier>_processor
- maximum value: max<identifier>
- position of maximum value: max<identifier>_position
- processor ID of maximum value: max<identifier>_processor

Also
- added documentation to header
- added 'resultName' to enable user to specify alternative name for
  output field