tree 7f45dacc815c45111b501fe9d97ab735fcf30ef8
parent dfb201220c034fde00a242d0533bef3f73b2907d
author Alessandro Gentilini <agentilini@gmail.com> 1443038384 +0200
committer Sameer Agarwal <sameeragarwal@google.com> 1445539622 +0000

Add Bessel functions in order to use them in residual code.

See "How can I use the Bessel function in the residual function?" at
https://groups.google.com/d/msg/ceres-solver/Vh1gpqac8v0/NIK1EiWJCAAJ

Change-Id: I3e80d9f9d1cadaf7177076e493ff46ace5233b76