Add subtask to the validator command line
Italian format: Task's yaml file is read from inside the task folder.
Lithuanian translation
Fix psutil in requirements.

psutil 2.0 has changed its API, making CMS incompatible with the new version.
Fix test interface when using a translation.

The file input element for the input file had a translated name attribute,
which caused the server to ignore the field and complain about missing file.
Fix an testing interface error when the contest has no tasks.
Fix YamlLoader reimport when "sol" subdirectory doesn't exist.
Fix reimporter to not wipe out user questions.
Add contributor
Add 'per_user_time' field to YamlLoader
Fix typo in cms.conf.sample
Update cmsMake to new get_compilation_commands API
Add contributors
Fixed RS not finding some services.

Sometimes psutil report a commandline like '/usr/bin/env python2 ...'
instead of 'python2 ...'. The cause is unknown, but this simple change
to the detection routine solves the symptom.