Merge pull request #2212 from andrew-platt/b/docs_update

Minor corrections to docs

Author: andrew-platt

docs/source/user/api_change.rst

@@ -49,6 +49,8 @@ Additional ressources:
 
 - A directory with a working example: `here <https://github.com/OpenFAST/r-test/blob/dev/modules/aerodyn/ad_BAR_OLAF/OpenFAST_BAR_00_AeroDyn15.dat>`__
 
+- An example python converter (v3.5.x to 4.x): `here <https://github.com/OpenFAST/openfast_toolbox/blob/dev/openfast_toolbox/converters/examples/Main_AD30_AD40.py>`__
+
 
 =========================== ========================================================= 
 Old inputs                  Corresponding new inputs                                  
@@ -58,7 +60,7 @@ Old inputs                  Corresponding new inputs
 `WakeMod=2` ("DBEMT")       `Wake_Mod=1` and `DBEMT_Mod={1,2,3}`                      
 `WakeMod=3` ("OLAF")        `Wake_Mod=3`                                              
 `AFAeroMod=1`               `UA_Mod=0` and `AoA34=False`                              
-`AFAeroMod=2`               `UA_Mod>0` and `AoA34=False`  and `UA_Mod=UAMod`          
+`AFAeroMod=2`               `UA_Mod>0` and `AoA34=True` and `UA_Mod=UAMod`
 `FrozenWake=True`           `DBEMT_Mod=-1`                                            
 `FrozenWake=False`          `DBEMT_Mod=0` (quasi-steady) or `DBEMT_Mod>0` (dynamic)   
 `SkewMod=2` (Glauert)       `Skew_Mod=1` and `SkewRedistr_Mod=1`                      

docs/source/user/beamdyn/appendix.rst

@@ -51,7 +51,7 @@ outputs are expressed in one of the following three coordinate systems:
 
 .. _bd-output-channel:
 
-.. figure:: figs/bd_output_channel.pdf
+.. figure:: figs/bd_output_channel.png
    :width: 500px
    :align: center
 

docs/source/user/beamdyn/figs/bd_frame.png

@@ -23,7 +23,7 @@ Coordinate Systems
 
 .. _bd-frame:
 
-.. figure:: figs/bd_frame.pdf
+.. figure:: figs/bd_frame.png
    :width: 100%
    :align: center
 
@@ -312,15 +312,15 @@ References :cite:`Patera:1984,Ronquist:1987,Sprague:2003,Sprague:2004`.
 
 .. _N4_lsfe:
 
-.. figure:: figs/n4.pdf
+.. figure:: figs/n4.png
    :width: 47%
    :align: center
 
    Representative :math:`p+1` Lagrangian-interpolant shape functions in the element natural coordinates for a fourth-order LSFEs, where nodes are located at the Gauss-Lobatto-Legendre points.
 
 .. _N8_lsfe:
 
-.. figure:: figs/n8.pdf
+.. figure:: figs/n8.png
    :width: 47%
    :align: center