Release v0.3.0

Changes since v0.2.0:

• [CMake] update minimal eigenpy version
• Add operator == and != for all curves
• Add methods isApprox() and isEquivalent() to all curves
• Fix optional dependency to pinocchio for python bindings
• [Python][Tests] remove all unecessary reshape(-1,1) in python
• Rework the class piecewise_curve to make it generic and remove the need to specify the type of curve used as a template argument, can now mix any kind of curves inside
• Rework the methods convert_to_X_from_Y to convert_to_X and remove the need to specify the input type as template argument
• Add compute_derivate_ptr() method to curve_abc and implement it in all child classes
• Add degree() method to curve_abc and implement it in all child class
• Factorize the most commonly used typedef with template argument in fwd.h
• [Python] correctly define eigenpy matrix type for point3 and point6
• [CMake] fix hardcoded path
• [CMake] fix install path of optimization files
• [Tests][Python] use Quaternion.isApprox to test equality instead of ==
• Add SE3 with pinocchio
• Add conversion functions from piecewise curve to python bindings
• Optimization
• Fix all compiler warnings
• Export plot