add filter tests.
fix test dependencies.
add Strategy Proxy constructors, export query function.
add cookie filter.
update documents, dependencies.

add tagged dependency to apiary-cookie(ghc-7.4 compatible).
update cookie example, README.md, query document.
Merge branch 'develop'

add filter tests.
add Strategy Proxy constructors, export query function.

apiary-cookie:
  add cookie filter.