Show library path and where each package is loaded from

[gaborcsardi]

Closes #9.

[codecov-io]

Codecov Report

Merging #20 into master will increase coverage by 0.57%.
The diff coverage is 88.23%.

@@            Coverage Diff             @@
##           master      #20      +/-   ##
==========================================
+ Coverage   90.29%   90.86%   +0.57%     
==========================================
  Files           8        8              
  Lines         206      230      +24     
==========================================
+ Hits          186      209      +23     
- Misses         20       21       +1

Impacted Files	Coverage Δ
R/loaded-packages.R	100% <100%> (ø)	⬆️
R/dependent-packages.R	97.87% <100%> (+0.19%)	⬆️
R/package-info.R	85.84% <81.81%> (+0.12%)	⬆️
R/printing.R	83.33% <0%> (+16.66%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update dc31f4e...2193e20. Read the comment docs.

[gaborcsardi]

This is not bad, but ideally we would distinguish between loaded path and on disk path.