Refs #0

Summary of changes

- Added capability to read and write sparse matrices in the ASCII/Matlab
  format used by PETSc.
- Added capability to read mesh constraint rows from an arbitrary sparse
  matrix.  This will enable IGA solves on more flexible meshes without
  perfect body fit domains.
- Added vector-valued parameter support in Reduced-Basis code.
- Added normalization to Empirical Interpolation Method in Reduced-Basis
  code.
- Removed redundant mapping code for FEXYZ.  Instead use the common
  mapping code, which has additional optimizations, and which avoids a
  bug triggered by MOOSE use of those optimizations.
- Fixed bugs in Tet14 element refinement with non-default diagonal
  selection.
- Always number assembly element nodes contiguously when reading
  IsoGeometric Analysis meshes.  This avoids a bug in transient IGA
  solves on distributed meshes with discontinuous assembly elements.
- Minor bug fixes to example applications' common shell functions, test
  execution in configurations without numeric solver libraries, an
  unused variable warning on newer compilers,