Make NTS more useful in SV.

[schlafly]

Biggest change is making tile design hour angles depend on conditions, so that SV tiles can have separately optimized HA in dark/gray/bright conditions.

• NTS should ignore completeness fraction when computing exposure times in commissioning mode
• no need for dec-based priority in commissioning mode
• use upper case field names in arrays
• add mechanism to boost priority of tiles that have already been started but not finished
• scheduler should return program of scheduled program, not the conditions corresponding to the time
• add sv mode to afternoon planning
• let NTS find tonights config file by default
• afternoon planning always writes config file to config.yaml in nightly directories
• NTS provides a count and exptime keyword for split exposures
• NTS provides conditions, program, exposure_factor keywords for information
• add moon_up_factor to config file to allow specifying the relative amount of time needed in different conditions
• let tiles have different design hour angles in different conditions, to enable tiles to be observed in multiple conditions
• loosen permissions on afternoon planning directory so msdos / desiobserver can create request logs / queued files there.

[weaverba137]

Is there a reason the branch nts-in-sv2 has not been deleted?