Add benchmark notebook

[alejgh]

Closes #60

We have added a new benchmark notebook where we detect the bottlenecks of the sync system and we compare the performance of the basic operations vs the batch ones implemented in #61

We are using two different datasets for the benchmarks. A real one from DBpedia and a synthetic one generated using the BSBM tool. More information about them and the benchmarking process can be accessed in the notebook.

[codecov]

Codecov Report

Merging #62 into develop will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop      #62      +/-   ##
===========================================
+ Coverage    98.03%   98.03%   +0.01%     
===========================================
  Files           15       15              
  Lines          760      761       +1     
===========================================
+ Hits           745      746       +1     
  Misses          15       15              

Impacted Files	Coverage Δ
hercules_sync/triplestore/triple_info.py	99.39% <100.00%> (+0.01%)	⬆️

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