Add trajectories and markers

Add plots of frame
Add marker functionality to decompose 3 markers into x,y,z yaw pitch roll

Add error progpagation tools and test function

Add resources such as 3 body marked bee of learning flight in Doussot 2017
Calibration of Doussot 2018a

Add input output function to load ivfile trajectory and opencv calibration

Agent was not using convention in a safe manner. For example for database the convention should be return by the database itself if unique.
The speed update in moving was not done with .loc and therefore lead to unchanged values
the model of hafner have been updated to correct a mistakes in the viewing direction

Will be useful to collected different models

the database access was done in a more complicated way than needed

The matrix_world of the camera in Blender is column-major ordered and not row-ordered as in python
Thus the tranpose is given as matrix_world

Edit the tunnel of sridhar, so that we can render what the bee sees

Added function to load trajectory from csv file
Added one environment (Sridhars tunnel) and one trajectory to test overlaying
Added tables in requirement (anticipation for hdf file)

to overlay a trajectory in a blender environment (in order to debug misaligment between world and trajectory
to render images along a trajectory

A command line can be used to create grid based database

Added Trajectory tools to load from dataframe
Change database a bit so to return a Trajectory whenever possible (i.e. unique convention)
Clean a bit the code in dataframe to check user validity. Code was redundant

So that grid and trajectory rendering can be performed seemlessly
The test fucntion does not run yet

These files have been used for a presentation
They will be place in a tutorial or default like function to faciliate running model on world

Help to work with pandas multiindex dataframe
Will support lollipop plots

This feature will be useful for easy trajectory rendering