- Changes to CMake scripts to make it easier to include in other proj…

…ects

- Added proper export decorations to API functions

- Better CMake install locations

- Oceanscience reader compilation issue

- Beginning of OceanScience reader

- Incorrect install target

- Conductivity -> salinity function

- Corrected determining sound speed file type from extension

- Reader for a simple text sound speed file

- Determining type based on filename extension

- Incorrect include for LatLong.h

- More checks for physically realizable values