cmake: remove arguments to else and endfoo commands

They're unnecessary and annoying to keep in-sync anyways. Just remove
them.

Change-Id: I7fc3bdad435406163823c3cbdf1e3b4263cf9a94
numpy: check for NumPy with FOUND_NUMPY

As per CMake/TestNumPy.cmake.

Change-Id: I7dd426e6fc8dbbe391d6468ccc85d1a8601139c6
eigen: remove broken version check

We require CMake >= 2.4.0 anyways, so just always do it.

Change-Id: I5a72cba283878a22f3a13ae8b5d35668876e0ddf
Update with VTK fix for XML error message

Change-Id: I918fee4055bac48f06f9c24e6f86b52f76b34d72
Merge topic 'fix-xml-crash-on-close' into next

e23e795a Update with VTK fix for XML error message
Merge topic 'remove-else-and-endfoo-cmake-args' into next

f17c27cd eigen: remove broken version check
1f7409da numpy: check for NumPy with FOUND_NUMPY
44f72c93 cmake: remove arguments to else and endfoo commands