Release of version 0.5.2.

[CMake] fix eigen include dir for Fedora

same as 65315995

serialization version

With Boost 1.72.0, if the sinusoidal comparison and the sinusoidal
serialization tests are in the same test file, the tests succeed, but
are followed by a "free(): invalid pointer" exception, marking the test
as failed.

This makes no sense, but the workaround is trivial.

Add piecewise::load_from_text_file

New curves type required by sot-talos-balance

Use Bezier formulation for cubic hermite

Check input degree before converting curve to bezier or hermite