Fixes for input dicts

• a few quick fixes for the input dict method of initialization

Fixes derivative issues caused by bodies

• if your geometry had a body then some of the derivatives were incorrect, which is now fixed.
• The main errors I found were the stability and body-axis derivatives and derivatives w.r.t flight condition variables (alpha, beta, Mach)

Added Body Forces API and fixes to strip forces

• Add API to get the body forces (ovl.get_body_forces())
• added body geom plotting to plot_geom command
• add body force, surface force, and strip force checking to AVL analysis comparison
• fix CP X/c in strip forces
• changed sign of Cl and Cn in strip forces so that the values are in the body axis as expected.

Fix strip and surface forces

Fixes the surface and strip force issues identified by @denriquezfirestorm introduced in version 2

Expose more system matrices

Users can now get the A,B and rhs for the system of dynamic equation via get_system_matrices.

Fixed storage of xfmin and xfmax airfoil parameters Latest

The min and max extents when using the Airfoil or NACA section key word were being read and applied correctly just not saved. This release fixes that so xmin and xmax variables are correctly returned from the python layer.

updates to AVL, variable renaming, API changes

A summary is

1. Renamed force and derivative coefficients for consistency with AVL and to distinguish between body axis and stability axis
2. Introduced body axis derivatives via a new method get_body_axis_derivs()
3. Changed setting API for variables, control deflections, and constraints
4. Upgraded to AVL v3.52 source code with updated physics models

Add option for A matrix in body axis

• just a small addition for the get_system_matrix method. Now you can add the option in_body_axis to match how AVL displays the data.

fixed surface forces output

see issue #27

Added more stability parameters for use in optimization

• added "spiral parameter" (CRTOT_BECNTOT_RZ / (CRTOT_RZCNTOT_BE)) according to original code this should be greater than 1
• added "lateral parameter (CNTOT_BE/abs(CRTOT_BE))" this was requested by a user for use on their project
• fixed an issue with setting the surface spacing to use sectional spacing when surface spacing was first specified.