The support is compliant with ISO-8601 standard.

Fixes issue #237

Users can now tune max degree, max eccentricity power and max frequency
in true longitude for short period terms.

The global DSSTCentralBody force model, which was only a container
for one zonal model and one tesseral model, has been deprecated.

This will allow in a later step finer tuning of both zonal and tesseral
terms. If we had kept DSSTCentralBody, the construction parameters would
have been a huge mess of maxIndices (indeed, even separating zonal from
tesseral will induce constructors with numerous parameters ...)

Version greater than 0.7.4, but not 0.7.6, hence 0.7.5 ...

The previous jacoco plugin version was not compatible with Jenkins
anymore.

Fixes issue #236

Thanks to Espen Bjørntvedt for the translations

Thanks to Thomas Neidhart for the translations!

Thanks to Beatriz Salazar García for the translations

Thanks to Roberto Alacevich

Conflicts:
	src/site/xdoc/changes.xml

Thanks to Lucian Barbulescu

This setting is independent from the mean elements
settings in DSST tutorial.