fixed a bugg where number of cells was only based on one edge
Widget now have a pointer to hexBlocker for use.

Will later change them to work with hexBlocker rather than to
send signals to MainWindow.
added new widget for edge properties
fixed cell count message
It's now possible to set grading on edges.

It's possible to select whether or not grading should be propagated
to parallel (or dependent) edges.
Now reads grading when reading blockMeshDict

Fixed a bug which caused the program to crash after reading hexBlockDict
Added a grading calculator

I'm using Markus Hartinger calculator at
http://www.cfd-online.com/Forums/openfoam-meshing-blockmesh/61785-blockmesh-grading-calculator.html
changed so that previous patches are shown when selecting new ones
added a hexahedron to show hexBlocks
show edges on patches
added function in hexblocker to remove a block.

o No GUI button yet.
o HexPatches no has regular pointers to hex block since they are not
  created in HexPatch.
Added a new InteractorStyle which allows selection of HexBlock, HexPatch or HexEdge

Further the user can rotate the model while selecting. There are three modes:
o single - only one object can be selected
o pair - only two can be selected, the second is colored blue
o multi - any number can be selected.

Deselection is done with the right mouse button.
added gui button to delete blocks
added icon for the delete blocks action
added function for controlling visibility of patches
added visibility actions for HexEdge, HexPatch and HexBlocker
reworked the method of deleting objects
Removed obsolete interactorstyles

All block, patch and edge selection is now handled in
InteractorStyleActorPick.
removed the "#include" statements of the old interactors
Merge remote-tracking branch 'upstream/master'