NEW: Sanitise task name in runTask
Fixing header case
Merge pull request #3380 from silverstripe-rebelalliance/cwp171

NEW: Sanitise task name in runTask
Merge pull request #3383 from dhensby/pulls/fix-send-file-header

Fixing header case in `send_file`
BUG Fix 'undefined index 0'
Merge pull request #3386 from tractorcow/pulls/3.1/abstracttest

BUG Fix 'undefined index 0'
BUG Custom label set in summary_fields config gets overridden
Merge pull request #3387 from halkyon/summary_fields_custom_label2

BUG Custom label set in summary_fields config gets overridden