Readme update

[aniampio]

Add acknowledgements for the EU project POINTER from which we got money to work on Sphinx.

Part added at the bottom of the README file
"This code has received partial funding from the Next Generation Internet POINTER programme of the European Commission, as part of the Horizon 2020 Research and Innovation Programme, under Grant Agreement Nº 871528."

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.50%. Comparing base (26d3042) to head (1bee1be).
⚠️ Report is 22 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/payload/mod.rs	0.00%	2 Missing ⚠️
src/route.rs	0.00%	2 Missing ⚠️
src/header/routing/nodes.rs	0.00%	1 Missing ⚠️
src/surb/mod.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop      #87       +/-   ##
============================================
- Coverage    84.78%   70.50%   -14.28%     
============================================
  Files           20       21        +1     
  Lines         1676     2265      +589     
============================================
+ Hits          1421     1597      +176     
- Misses         255      668      +413     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.