Improve code quality of installation scripts

[rogerfraser]

No description provided.

[codecov-io]

Codecov Report

Merging #3 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master       #3      +/-   ##
==========================================
- Coverage   35.83%   35.82%   -0.02%     
==========================================
  Files         114      114              
  Lines       33246    33246              
==========================================
- Hits        11915    11910       -5     
- Misses      21331    21336       +5     

Impacted Files	Coverage Δ
dynadjust/dynadjust/dnageoid/dnageoid_ext.hpp
...ynadjust/include/measurement_types/dnadistance.cpp
...nadjust/include/measurement_types/dnadirection.cpp
dynadjust/dynadjust/dnareftran/dnareftran.cpp
dynadjust/include/parameters/dnaellipsoid.hpp
dynadjust/include/io/dnaiomap.cpp
dynadjust/include/io/dnaiobst.hpp
...adjust/dynadjust/dnaplotwrapper/dnaplotwrapper.cpp
...djust/include/measurement_types/dnagpsbaseline.cpp
...t/dynadjust/dnaadjustwrapper/dnaadjustprogress.cpp
... and 218 more

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