Corrected logic for wrapping data when database allows and added guards to prevent wrapping when database does not allow. This resolves issue #86.
data_grid derivative formula has been revertered to the original equation. data_grid_svp/bathy have had slight tweaks to code to be more visually easier to read. The derivative for the data_grid_bathy was missing divisor of the interval around the interpolation point. Cleaned up datagrid_test code.
Merged changes from origin/master to local/master.
Merge branch 'master' of ssh://github.com/campreilly/UnderSeaModelingLibrary into netcdf_wrapping
Completed testing for netcdf wrapping logic, resolving issue #87
	-Added two new tests, read_profile_test/nonglobal_database and read_bathy_test/nonglobal_database. These tests, are used to verify that the new logic for nonglobal database sets is working properly.
	-Corrected a min/max error in the longitude dimension with netcdf_bathy/profile.
Added support nc files for tests.
Merge pull request #87 from campreilly/netcdf_wrapping

Corrected logic for wrapping data when database allows and added guards .to prevent wrapping when database does not allow.
Merge branch 'master' into unsigned2size_t

Resolve conflicts in
	types/data_grid_bathy.h
	types/test/datagrid_test.cc