Updated EnvCfgFile.moon_check method
Updated EnvCfgFile.moon_check method

	modified:   qplan/filetypes.py

- moon_check updated to adhere to following table:

Ph1 Constraint   envcfg:dark   envcfg:gray envcfg:dark+gray
dark                OK             OK           OK
gray                Error          OK           Error
dark/gray           Error          OK           OK

Based on Onodera-san e-mail from 16 November 2017.

naojsoft/qplan