Conflicts:
	src/test/java/org/orekit/rugged/intersection/duvenhage/MinMaxTreeTileTest.java

Fixes issue #189

Fixes issue #189

The new test for the ancestor method fails, but the failure is probably
related to issue#189 (in fact the issue was identified while testing
this). So we will first solve issue#189 in another branch and merge it
once solved, before continuing working on this branch.

This is an attempt at solving issue #188.

Ensure LICENSE and NOTICE files are available in the binary jar.

Added a build number to the MANIFEST.

This algorithm is similar in spirit to the IGNORE_DEM_USE_ELLIPSOID, but
with a user-specified elevation instead of always using 0.0 elevation.

Implements feature #187.

Thanks to Espen Bjørntvedt for the translations.

The derivatives are computed with respect to transforms parameters.
This is the first step towards los calibration.