v1.20-beta: Merge branch 'GNSSAR'. Adding:

- GAL ambiguity fixing
- modeling of GAL eccentric satellites E14/SVN202 and E18/SVN201
- increasing maximum observed satellites to 40
- BEI satellites in SVB

Resolved Conflicts:
	gpsppp.svb_bei_yrly
	gpsppp.svb_gln_yrly
	gpsppp.svb_gnss_yrly