various doc and style improvements

[codecov[bot]]

Codecov Report

Merging #94 (cc60187) into master (0a4740d) will decrease coverage by 83.72%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #94       +/-   ##
==========================================
- Coverage   83.71%   0.00%   -83.72%     
==========================================
  Files           4       4               
  Lines         350     346        -4     
==========================================
- Hits          293       0      -293     
- Misses         57     346      +289     

Impacted Files	Coverage Δ
src/parsing_routines_matrixnetworks.jl	0.00% <ø> (-96.37%)	:arrow_down:
src/ReactionNetworkImporters.jl	0.00% <0.00%> (-100.00%)	:arrow_down:
src/parsing_routines_bngnetworkfiles.jl	0.00% <0.00%> (-95.75%)	:arrow_down:

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[isaacsas]

Thanks!