added seadas reader (orig. code)
made computeLineHeight and computeSlope methods public (are used in Coastcolour)
updated seadas-reader dependencies
converted field to local variable
using the NetcdfFileOpener in the getDecodeQualification
Merge branch 'seadas-reader_BEAM5'

Conflicts:
	beam-flhmci/src/main/java/org/esa/beam/processor/flh_mci/BaselineAlgorithm.java