Merge pull request #32 from BBC-News/use-sequencer-gem

Use alephant-sequencer
Merge pull request #33 from BBC-News/use-alephant-logger

Use alephant-logger
Merge pull request #34 from BBC-News/use-alephant-cache

Use alephant-cache
Merge pull request #35 from BBC-News/use-alephant-renderer

Use alephant-renderer
refactor and and lookup for vary
Merge branch 'prepare-for-lookup' of github.com:BBC-News/alephant into prepare-for-lookup