Add link to Ipsilon

[axic]

No description provided.

[codecov]

Codecov Report

Merging #854 (6114f8f) into master (b9e1c18) will increase coverage by 0.11%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #854      +/-   ##
==========================================
+ Coverage   99.15%   99.27%   +0.11%     
==========================================
  Files          87       87              
  Lines       12316    12333      +17     
==========================================
+ Hits        12212    12243      +31     
+ Misses        104       90      -14     

Flag	Coverage Δ
spectests	89.78% <ø> (ø)
unittests	99.15% <ø> (ø)
unittests-32	99.25% <ø> (?)

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see 8 files with indirect coverage changes