Add labels to docs

Author: robbievanleeuwen

docs/source/rst/geom_mesh.rst

@@ -128,6 +128,8 @@ If the geometry has multiple regions, then the
 See :ref:`ref_ex_custom` for an example of this implementation.
 
 
+.. _label-geometry-dxf:
+
 Geometry from .dxf Files
 ------------------------
 
@@ -144,14 +146,16 @@ file (i.e. the number of contiguous regions).
    :noindex:
 
 
+.. _label-geometry-3dm:
+
 Geometry from Rhino
 -------------------
 
 Geometries can now be created from .3dm files and BREP encodings.
 Various limitations and assumptions need to be acknowledged:
 
 * sectional analysis is based in 2d and Rhino is a 3d environment.
-* the recognized Rhino geometries are limited to planer-single-surfaced BREPs.
+* the recognised Rhino geometries are limited to planer-single-surfaced BREPs.
 * Rhino uses NURBS for surface boundaries and *sectionproperties* uses piecewise linear boundaries.
 * a search plane is defined.
 

docs/source/rst/section_library.rst

@@ -8,6 +8,9 @@ In order to make your life easier, there are a number of built-in functions that
 structural cross-sections, resulting in :class:`~sectionproperties.pre.geometry.Geometry` objects.
 These typical cross-sections reside in the ``sectionproperties.pre.library`` module.
 
+
+.. _label-primitive-library:
+
 Primitive Sections Library
 ==========================
 
@@ -126,6 +129,8 @@ Bulb Section
       :noindex:
 
 
+.. _label-concrete-library:
+
 Concrete Sections Library
 =========================
 
@@ -145,6 +150,8 @@ Concrete Circular Section
     :noindex:
 
 
+.. _label-bridge-library:
+
 Bridge Sections Library
 =======================