removed main check not needed
combined with changes to the billiard fork this works now.
adding freeze support import for non darwin os
Merge branch 'master' into mac_os_multiprocessing_patch

Conflicts:
	pupil_src/capture/main.py
small fix in imports
Merge branch 'mac_os_multiprocessing_patch'
Merge branch 'mac_os_multiprocessing_patch'
Merge branch 'master' into selectable_capture