Fixing handling of bad_alloc for task_execution_policy
Adding parallel::min_element, parallel::max_element, and parallel::minmax_element
Adding missing files
Fixing shadowed template arguments
Fixing dispatch overload for task_execution_policy
Fixing copyright
Some algorithms require decorated_iterator to be default constructable
Merge pull request #1231 from STEllAR-GROUP/parallel_minmax

Parallel minmax