Release 1.2

• Added new adjust_x routines to handle interpolation in grid voids
• Added Grid Voids section to documentation
• Improved grid optimization, so that unusable data are discarded
• Changed Python specgrid interpolation routines to return numpy arrays
• Added new inspect_grid tool
• Moved data files outside documentation, since they change on a different cycle than the software (see the grid files and passband files pages)