Use Standardized Units Across Application

[siddheshraze]

Currently, users are allowed to specify an SI unit of distance when submitting ANY data. This needs to be restricted.

A standard unit of measure should be assumed/used for all numerical data. For HOM/coordinates, this is the m unit. For area, this is the m^2 unit. For DBH values, the mm should be the standardized unit. Users should be informed of this requirement and existing data should be updated to reflect these changes.

[siddheshraze]

Standardized units system has been implemented and all unit references from application have been removed. System now uses default values as defined in PLOTS table.