Prepare release 3.2

[bchretien]

This issue aims at tracking the state of the 3.2 release.

• [x] Prepare dev branches
  • [x] Make Solver and Problem only templated on the matrix type
  • [x] Make Problem constructor take a shared_ptr. Const ref version kept for backward compatibility (for now...). (cf. 6cafd4cecae07facc59e16480ba17aefa1ef4b18)
  • [x] roboptim-core @ dev
  • [x] roboptim-shared-tests @ dev
  • [x] roboptim-core-plugin-ipopt @ dev
  • [x] roboptim-core-plugin-nlopt @ dev
  • [x] roboptim-trajectory @ dev (cf. roboptim/roboptim-trajectory#35)
  • [x] roboptim-core-python @ dev
  • [x] roboptim-core-manifold @ dev
  • [x] roboptim-capsule @ dev
• [x] Merge dev branches to master
  • [x] roboptim-core @ master
  • [x] roboptim-shared-tests @ master
  • [x] roboptim-core-plugin-ipopt @ master
  • [x] roboptim-core-plugin-nlopt @ master
  • [x] roboptim-trajectory @ master
  • [x] roboptim-core-python @ master
  • [x] roboptim-core-manifold @ master
  • [x] roboptim-capsule @ master

Follow-up work that will need to be done at some point:

• [x] roboptim-core-plugin-cminpack
• [x] roboptim-core-plugin-eigen
• [x] roboptim-core-plugin-knitro (cf. roboptim/roboptim-core-plugin-knitro#1)
• [x] roboptim-core-plugin-nag (cf. roboptim/roboptim-core-plugin-nag#7)

[bchretien]

NAG and KNITRO have been updated accordingly, although not released. Still, I'm closing this.