Web: job_info page shows tiles if they are set
DB: add get_date_range function
DB: allow find_jobs to search by tile number
Web: let tile_list search by obsnum and project
JCMTObsInfo: add instrument as option
JCMTObsInfo: scanmodes includes ACSIS modes
DB: processing_time result updated
Web: CSS temporary color for INVALID QA
WEB: job_qa page only shows log link if logs exist
Web: job_info page shows QA state and link to qa page