Fix Bicubic interpolation. Ensure tests are passing. Bump up the vers…

…ion and update changelog

Add warnings to buggy modules. Update changelog

update changelog and bump up the version

fixed up documentation [ci skip]

raised tick factor for ghc 7.10.2

increased tolerance for encode/decode test

fixed backwards compatibility with ghc-7.8

fixed up some haddock. [ci-skip]

applied some hlint suggestions, removed unnecessary travis builds

Made sure library is still compatible with ghc 7.8, fixed lehins#4