block_istart_manager_report initial commit.
Renamed block_istart_manager_report block_istart_reports as it will incorporate reports for students, trainers and managers.
block_istart_report: sends blank email.
block_istart_report: now gets report users from given group.
block_istart_report: now gets block id from blocks table.
block_istart_report: now gets block id from blocks table v2.
block_istart_report: now gets courses that contain the istart_report block.