Add static RDF parsed data

[srevinsaju]

RDF data is now created on every static HTML generation. Static RDF are more useful than server side processed
RDFs for performance reasons; aslo(v1) took 5-7 seconds to query the database and generate a RDF, while in thery
the new data should be delivered to the user almost as immediate

[codecov]

Codecov Report

Merging #16 into master will decrease coverage by 0.06%.
The diff coverage is 29.78%.

@@            Coverage Diff             @@
##           master      #16      +/-   ##
==========================================
- Coverage   31.95%   31.89%   -0.07%     
==========================================
  Files           6        7       +1     
  Lines         582      627      +45     
==========================================
+ Hits          186      200      +14     
- Misses        396      427      +31     

Impacted Files	Coverage Δ
aslo4/generator.py	29.35% <9.09%> (-0.55%)	⬇️
aslo4/rdf/rdf.py	36.11% <36.11%> (ø)

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