Stop if scf hits MAXSCF

[cnegre]

This will stop the calculation if SCF hits the limit.

[codecov]

Codecov Report

Merging #88 into master will increase coverage by <.1%.
The diff coverage is 57.1%.

@@           Coverage Diff            @@
##           master     #88     +/-   ##
========================================
+ Coverage      48%     48%   +<.1%     
========================================
  Files         198     198             
  Lines       16073   16075      +2     
========================================
+ Hits         7725    7728      +3     
+ Misses       8348    8347      -1

Impacted Files	Coverage Δ
src/qconsistency.f90	86.4% <0%> (-0.6%)	⬇️
src/qneutral.f90	52.5% <100%> (+0.4%)	⬆️
src/latteparser_latte_mod.f90	91.3% <100%> (ø)	⬆️
src/latte_lib.f90	47.2% <33.3%> (-0.5%)	⬇️
src/kgradH.f90	53.9% <0%> (+1.3%)	⬆️

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