Improve code coverage

[learner-long-life]

Currently nyc is instrumented to run as npm run cov and produces the following output.

There are some errors to remove, as well as improving code coverage below closer to 100%.

----------------------------	----------	----------	----------	----------	-------------------	File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	80.5	61.36	72.37	81.85
democracy	90	100	83.33	90
index.js	90	100	83.33	90	11
democracy/js	77.53	60.82	71.91	79
compile.js	90.48	83.33	100	90	52,53,54,55
deploy.js	88.64	66.67	88.89	88.37	43,44,45,66,67
get.js	100	100	100	100
lib.js	68	58.73	64.52	70.63	... 31,232,233,234
link.js	91.89	66.67	100	94.44	34,42
set.js	100	100	100	100
utils.js	74.52	58.02	67.5	75.35	... 48,249,297,304
democracy/tests	87.1	80	71.93	88.14
db.spec.js	100	80	93.33	100	14
deploy.spec.js	52.17	100	17.65	55.81	... 56,58,60,62,65
getset.spec.js	100	100	100	100
link.spec.js	93.55	100	87.5	93.55	41,42
round-trip-use-library.js	100	100	100	100
----------------------------	----------	----------	----------	----------	-------------------