Forget dx.doi.org URLS when getting DOIs from them

[GlazerMann]

Fixes inconsistency in using URLS.
When we find a DOI, get rid of URL and add DOI.

[codecov]

Codecov Report

Merging #261 into development will decrease coverage by 0.06%.
The diff coverage is 0%.

@@                Coverage Diff                @@
##             development     #261      +/-   ##
=================================================
- Coverage          73.44%   73.38%   -0.07%     
- Complexity          1234     1235       +1     
=================================================
  Files                  8        8              
  Lines               2335     2337       +2     
=================================================
  Hits                1715     1715              
- Misses               620      622       +2

Impacted Files	Coverage Δ	Complexity Δ
Template.php	81.25% <0%> (-0.1%)	1165 <0> (+1)

---

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 4b9767d...72bd364. Read the comment docs.