- update BUILD.md to mention the possible build issues related to Qt.

- additional comments about using binaries for ParaView instead of
  building from source

- some systems (eg, opensuse) use that since it has both qt4 and qt5
  installed. ParaView now needs qt5 (preferrably 5.9).

STYLE: update version information for ParaView and Qt

- the cray 'cc' handles mpi paths, there is no mpicc

ENH: add support of additional configure options to some make scripts

- remove hard-coded --verbs from makeOPENMPI in favour of letting the
  user provide it via the command-line for makeOPENMPI.

  eg,  makeOPENMPI openmpi-1.10.6 -- --with-verbs=DIRECTORY ...