added PacsSpectro, SpirePhoto, SpireSpectro footprint
Merge branch 'master' of https://github.com/dobos/HerschelDB into spire

Conflicts:
	src/Herschel.Lib/Detector.cs
Updated file conversation to work with spire
Added spire logic and modified leg detection to use time gaps only and filter on bbid.
Fixed duplicate key error in leg detection.
Moved per instrument load logic from SQL to c#.
Unified SQL logic among instruments where possible.
Problem with FineTime from sampleTime conversion in case of SPIRE seems to be fixed now.
Removed UTC, will need to add function to convert to and from fine time.
Fixed sqlclr publish issues.
Angular velocity units for SPIRE fixed.
Inst ID handled correctly in footprint scripts.
Problems with observation footprint union.
Update dependencies. (Union and SmartUnion fixed in Spherical)
Changed region load/save to use functions from Spherical.
Spherical lib updated. Now field-based coloring is supported.
Minor fix in SQL script.
Instrument column added to HTM index.
Instrument added to observations. Filtering in search implemented.
Minor changes.
Regions are colored by instrument.
Added script to compute parallel footprints.
Search class now uses instrument and obsID as composite key.
Observation list and WS updated to use composite key as well.