added dropdown to top menu
added next and previous buttons (not yet working within search)
removed other from actions
added spec for next/previous
added pagination buttions to top of table view. Closes #38.
converted to puma by default
enabled ssl by default for puma
changed previous/next buttons to navigate within search results.  Closes #34.
added size label on oligo sequence field.  Closes #21.
tidied up table view appearance