(Update wrap) add functionality to pull docs from parent classes

[p-zach]

Update wrap to pull in this functionality. Also add a note to DEVELOP.md about docs inheritance and modify geometry.i so that logmaps have docs (expmap parameters were already correct).

>>> help(gtsam.Pose2.logmap)
Help on instancemethod in module gtsam.gtsam:

logmap(...)
    logmap(*args, **kwargs)
    Overloaded function.

    1. logmap(self: gtsam.gtsam.Pose2, p: gtsam.gtsam.Pose2) -> numpy.ndarray[numpy.float64[3, 1]]

    Applies logarithmic map to group element that takes *this to g.

    2. logmap(self: gtsam.gtsam.Pose2, p: gtsam.gtsam.Pose2, H1: numpy.ndarray[numpy.float64[m, n], flags.writeable, flags.f_contiguous], H2: numpy.ndarray[numpy.float64[m, n], flags.writeable, flags.f_contiguous]) -> numpy.ndarray[numpy.float64[3, 1]]

    logmap with optional derivatives

[p-zach]

Uh, not sure why the Ubuntu test is failing. @yambati03 ? I can't imagine this is an issue with my changes, lol.

[dellaert]

@p-zach @yambati03 what's needed to merge?

[p-zach]

Seems like the issue worked itself out. Added a commit to fix the tiny conflict in geometry.i. Good to merge.

[dellaert]

Awesome!