Merge pull request #34 from arduino/kill_process_darwin

`Kill` now kills all the childrens in the process-tree on MacOS and Windows.

Merge pull request #33 from arduino/add-wait-ctx

Added WaitWithinContext method.

Merge pull request #31 from arduino/kill_improvements

Improvements to Process.Kill() method.

Merge pull request #30 from arduino/improve_recursive_dirread

Do not stop `ReadDirRecursive*` on broken symlinks

Merge pull request #27 from arduino/generic-filter

Added generic filtering function for PathList

Merge pull request #26 from arduino/tidy-up-deps

Removed dependency on `github.com/pkg/errors`

Merge pull request #25 from arduino/integrate_executils

Integrate process handling helpers

Merge pull request #22 from arduino/restore-1.x-compatibility

Restore 1.x.x compatibility

Merge pull request #20 from arduino/fix_isinsidedir

Fix `Pahts.IsInsideDir` method when paths belongs to different drives/filesystem