Add #error when trying to build as Cocoa ARC

Proper ARC support is forthcoming, but this is useful for now.

Change-Id: Ie487b2d589511748dfb43841a2cdd1df3beb4101
Merge topic '14646-scalar-bar-borders' into pv-master

1aa0a945 Merge topic '14646-scalar-bar-borders' into master
02666b57 Merge topic 'unreachable-return' into master
d80ccfb6 Fix unreachable code warning in otherCellTypes.cxx.
2e262725 Merge topic 'catalyst-web-composite' into master
6d42e913 Improve basic search in web-catalyst
f43db5e0 Merge topic 'R_row_names' into master
20d5df76 BUG: Border visibility from underlying vtkScalarBar actor
48341cd5 copy row names from R to vtkTable
0b03bebf Merge topic 'catalyst-web-composite' into master
3ce7a4f1 Improve ParaView cinema UI
01a29205 Merge topic 'NSOpenGLPFACompliant' into master
dfaddbaa Merge remote-tracking branch 'pvvtk/pv-master' into HEAD
621c98ad Merge topic 'view-settings' into master
468f25df Removed all uses of deprecated NSOpenGLPFACompliant
410e53cd Name enum LEFT, BOTTOM, ... Location.
90ef4451 Merge topic 'vtkOStreamWrapper-std-string' into master
...
Merge topic 'view-setings' into pv-master

de01f9e8 Set Bold and Italic axis label properties for ScatterPlotMatrix.
5d417755 Add component-wise set functions for Border and Gutter (vtkChartMatrix)
Merge remote-tracking branch 'pvvtk/pv-master' into HEAD

* pvvtk/pv-master:

Change-Id: I36e7d9033c7ec65a4cbafc43f547eebf5219c237
Merge topic 'cocoa-arc' into master

bcb33444 Add #error when trying to build as Cocoa ARC