add BinDeps to require
Create build.jl
get library location from deps/deps.jl
use deps/deps.jl instead of hardcoded library name
do make install instead of going through cmake
update for upstream release, use unpacked_dir

Relies on https://github.com/JuliaLang/BinDeps.jl/pull/84 being merged and tagged,
or applied locally, to work on Windows.
Merge pull request #10 from tkelman/bindeps

Bindeps