AST: uninstantiated template
Fixed #5108 (false positive: uninitialized variable (assignment in function parameter))
Fixed #5107 (redundantAssignment when pointer changes)
Reduce variable scope.
htdocs: update html5 boilerplate.
htdocs: minor tweaks.

Update the tools to their latest versions.
Checkbufferoverrun: improved constness of local variables, no functional changes.
AST : cleanup unused functions