See github.com/JuliaOpt/Ipopt.jl/releases/tag/v0.6.0 for release notes

test callback (jump-dev#157)

* test callback

* Text tweaks for style

Fix gradient bug when no objective set (jump-dev#159)

Accept nothing for VariablePrimalStart (jump-dev#156)

* Accept nothing for VariablePrimalStart

Closes jump-dev#155

* need UniversalFallback to pass the test

update for MOI 0.8.1 (jump-dev#154)

Multi-GCC BinaryBuilder Binary Dependencies for Julia v0.7-v1.0 (jump…

…-dev#153)

* Update build.jl

* Update .gitignore

* Update REQUIRE

* Update Ipopt.jl

* Update Ipopt.jl

* Update runtests.jl

* Update Ipopt.jl

* Update Ipopt.jl

* Update REQUIRE

* Update .travis.yml

* Update appveyor.yml

* Update README.md

* Update README.md

* Update Ipopt.jl

* Update build.jl

* Update REQUIRE

* Update .travis.yml

* Update appveyor.yml

* Update build.jl

* Update build.jl

* Update README.md

* Update build.jl

* README.md fixes, environment variable for AmplNLWriter and note about gcc4 bug

* fix AmplNLWriter

* AmplNLWriter related clean-up

update for MOI 0.8 (jump-dev#152)

update for MOI 0.7 (jump-dev#151)

store options as vector of tuples instead of Iterator of pairs (jump-…

…dev#147)

* store options as vector of tuples instead of Iterator of pairs

* only convert to tuple if pair (bugfix for Julia v0.6)

* specify the type of options to vector of Tuples

* small doc string for options

@warn instead of warn( (jump-dev#1) (jump-dev#145)

* @warn instead of warn(