Update the Travis file of the workbench
fix output buffering levels
Faster int cast
A few cs fixes
Removed extra semicolons
Merge pull request #5625 from GrahamCampbell/4.2-cs

[4.2] A Few CS Fixes
Merge pull request #5596 from lucasmichot/4.2-int-cast

[4.2] Performances : Integer casting
Merge pull request #5560 from alprs/fix/ob-clear-all

Fix output buffering levels
Merge pull request #5540 from AntoineAugusti/4.2

Update the Travis file of the workbench
Clean up a few doc blocks.
added return void to doc block
added return type to docblock
Merge pull request #5636 from willharrison/4.2

Added return type to doc block