[dlopezaldama]

Title: Fixes #383: robustness and portability fixes; WIMSR WLUP conventions for WIMSD-5 libraries

Base branch: develop (rebased on NJOY2016.80, 51b1661).

What is fixed

1. wimsr: snu, abs1, ab0, xtr and sdp were used without initialization.
2. leapr: terps read out of bounds for a negative index; two write statements had a comma before the output
   list (non-standard, rejected by some compilers).
3. endf (tpidio): the input unit is rewound before the tape identification (the first record) is read.
4. util (openz): a scratch unit still open from a previous module is closed before it is opened again.
5. Array sizes: plotr/viewr mmax 20000 → 50000, maxaa 200000/500000 → 500000/5000000 (the viewr check uses
   mmax instead of a fixed 5000), viewr contour arrays 2000 → 10000; acepa nwscr 50000 → 250000.
6. main: the header comment no longer gives an old version number.

WIMSR: WIMS-D Library Update Project conventions (second commit)

This extension was reported to IAEA/NDS and implemented there for the continuity of the WIMS-D Library Update
Project (WLUP); it is needed to produce WIMSD-5 formatted libraries:

• the discrete inelastic levels (MT51-91) are added to the resonance scattering;
• iverw=5 (WIMS-E/WIMSD-5): the scattering resonance integrals are converted like absorption and fission
  (σb·σs/(σb+σa)), and the data are taken at the reference dilution sgref also when it is infinite;
• ifis=2 when the resonance tables have no fission.
  With the default iverw=4 the output changes only where inelastic levels fall inside the resonance groups (not the
  case in the LANL test 11 data).

Compared with the earlier version of this PR: the ACE reaction names of acecm moved to the ACER PR (#376), so that
the two PRs do not touch the same file.

Tests

• Rebased on develop (2016.80, 51b1661); replaces the earlier 2016.78-based commit of this branch.
• LANL test suite: 87/87 pass (test 11, WIMSR, unchanged). Reference tapes updated: the PostScript plots tests/06/referenceTape32 (2 points added)
  and tests/12/referenceTape24 (resonance plot with 1233 more lines): plotr thins each curve to about mmax points,
  so with mmax=50000 the curves are drawn with more points. No other tape changes.

Release notes entry

Proposed text for the next release section of ReleaseNotes.md (not added to the file in this branch, to avoid conflicts between the open PRs):

• WIMSR follows the conventions of the IAEA WIMS-D Library Update Project for WIMSD-5 formatted libraries (inelastic levels in the resonance scattering; iverw=5 scattering resonance integrals and reference dilution; ifis=2 without fission in the resonance tables).
• Uninitialized arrays in WIMSR and an out-of-bounds read in LEAPR were corrected; a few non-standard constructs were changed for portability (LEAPR write statements); scratch units are closed before being reopened; array sizes were increased in PLOTR, VIEWR and ACEPA (issue general updates for modules: leapr,endf,util,main,plotr,viewr,acecm,wimsr #383).