[issues-32] Adds a mixin to set options only once
[issues-32] Uses column-policy-options-once
[issues-32] Fixes issue with extra padding

When calc is supported then fluid-padding is reset in the
padding mixin since the fluid-padding is only for a calc work
around.
[issues-32] Updates the examples.
Merge pull request #36 from leadiv/issues-32

Issues 32 Add a column-policy-options-once mixin