Documentation and code clean ups (MIQ related) (#971)

* remove commented code

* typo

* clean up list of the arguments

* typo

* typos and different names

* rename files due to a typo and remove double include

* remove comments that do not document the code but are used to comment out code or to store TODOs that should not be placed in the code, anyway.

* clean up the documentation

* remove commented code

* add information to the doc

* improve readability of the code

* typo and a missing space

* fix a typo: missmatch -> mismatch

* remove unnecessary header files

* typos

* changed to camel notation

* clean up

* typo

* add limitations into the documentation

* camelCase

* lost refactor

* unify the variable's names

* clean up

* clean up

* missed refactor

* clean up

* name in the doc

* name in the doc

* further nameing convention changes

* refactored names missed by clion.

* unify names

* align the constructor's args

python/py_igl.cpp

@@ -35,7 +35,7 @@
 #include <igl/compute_frame_field_bisectors.h>
 #include <igl/cotmatrix.h>
 #include <igl/covariance_scatter_matrix.h>
-#include <igl/cross_field_missmatch.h>
+#include <igl/cross_field_mismatch.h>
 #include <igl/cut_mesh_from_singularities.h>
 #include <igl/deform_skeleton.h>
 #include <igl/directed_edge_orientations.h>
@@ -134,7 +134,7 @@ void python_export_igl(py::module &m)
 #include "py_igl/py_compute_frame_field_bisectors.cpp"
 #include "py_igl/py_cotmatrix.cpp"
 #include "py_igl/py_covariance_scatter_matrix.cpp"
-#include "py_igl/py_cross_field_missmatch.cpp"
+#include "py_igl/py_cross_field_mismatch.cpp"
 #include "py_igl/py_cut_mesh_from_singularities.cpp"
 #include "py_igl/py_deform_skeleton.cpp"
 #include "py_igl/py_directed_edge_orientations.cpp"