- Without using std namespace, not sure if the method was using
  double precision parameters.

- Sag can be calculated at any point along the curve.
- Tests have been added for Sag methods.

- Now accepts native catenary parameters (unit weight, end point
  spacing, etc) as well as a target value to determine the
  horizontal tension.
- LineCable has a new method to convert its parameters
  (constraint, ruling span spacing) to catenary parameters. Uses
  CatenarySolver to get the ruling span catenary.
- LineCableReloader updated to reference the new class interface.

- Coordinate bug fixed when both end points were left of origin.
- 3D -> 2D distance projection calculations weren't referencing
  std namespace functions.
- Space padding added for operators (divide/multiply,etc).
- Tests updated to calculate coordinates for a varying origin
  position.

- Without using std namespace, not sure if the method was using
  double precision parameters.

- Alphabetization

- Base class name is LineCableLoaderBase. Main purpose is to set
  up the LineCable for a sag-tension analysis.
- With a base class in place, a LineCableUnloader can be developed.
  Many of the setup methods are going to be reused.

- ThermalRating library files added to doxygen.
- Fixed any mistakes that showed up.