Add missing 'lap-and-up' and 'desk-wide' to 'hide' helper classes
Remove trailing whitespace.
Merge pull request #141 from javierav/whitespace

Remove trailing whitespace
Merge pull request #130 from bewildergeist/fix/hide-helpers

Add missing 'lap-and-up' and 'desk-wide' to 'hide' helper classes
Merge remote-tracking branch 'upstream/master'