Minor fixes before deployment

[alejgh]

• Infer label of an URI even if it doesn't contain a # symbol.
• Have a default language for labels and descriptions with no lang set.
• Return modification result from operations.
• Show modification results in listener.

[codecov[bot]]

Codecov Report

Merging #42 into master will decrease coverage by 0.24%. The diff coverage is 93.34%.

@@            Coverage Diff             @@
##           master      #42      +/-   ##
==========================================
- Coverage   97.42%   97.18%   -0.23%     
==========================================
  Files          15       15              
  Lines         618      637      +19     
==========================================
+ Hits          602      619      +17     
- Misses         16       18       +2     

Impacted Files	Coverage Δ
hercules_sync/listener.py	90.63% <0.00%> (-6.04%)	:arrow_down:
hercules_sync/synchronization/operations.py	100.00% <100.00%> (ø)
hercules_sync/triplestore/triple_info.py	96.70% <100.00%> (+0.06%)	:arrow_up:
hercules_sync/triplestore/wikibase_adapter.py	98.66% <100.00%> (+0.16%)	:arrow_up:

---

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 ed183f9...8113938. Read the comment docs.