WARNING: New definition ... is ambiguous with ...

[chkwon]

While testing PATHSolver.jl, I found these warnings:

WARNING: New definition 
    atan2(ForwardDiff.GradientNumber, Real) at /home/travis/.julia/v0.4/ForwardDiff/src/GradientNumber.jl:208
is ambiguous with: 
    atan2(Real, ForwardDiff.GradientNumber) at /home/travis/.julia/v0.4/ForwardDiff/src/GradientNumber.jl:208.
To fix, define 
    atan2(ForwardDiff.GradientNumber, ForwardDiff.GradientNumber)
before the new definition.
WARNING: New definition 
    *(Real, ForwardDiff.HessianNumber) at /home/travis/.julia/v0.4/ForwardDiff/src/HessianNumber.jl:98
is ambiguous with: 
    *(ForwardDiff.HessianNumber, Real) at /home/travis/.julia/v0.4/ForwardDiff/src/HessianNumber.jl:97.
To fix, define 
    *(ForwardDiff.HessianNumber, ForwardDiff.HessianNumber)
before the new definition.
WARNING: New definition 
    /(Real, ForwardDiff.HessianNumber) at /home/travis/.julia/v0.4/ForwardDiff/src/HessianNumber.jl:126
is ambiguous with: 
    /(ForwardDiff.HessianNumber, Real) at /home/travis/.julia/v0.4/ForwardDiff/src/HessianNumber.jl:123.
To fix, define 
    /(ForwardDiff.HessianNumber, ForwardDiff.HessianNumber)
before the new definition.
WARNING: New definition 
    ^(Real, ForwardDiff.HessianNumber) at /home/travis/.julia/v0.4/ForwardDiff/src/HessianNumber.jl:176
is ambiguous with: 
    ^(ForwardDiff.HessianNumber, Real) at /home/travis/.julia/v0.4/ForwardDiff/src/HessianNumber.jl:167.
To fix, define 
    ^(ForwardDiff.HessianNumber, ForwardDiff.HessianNumber)
before the new definition.
WARNING: New definition 
    atan2(ForwardDiff.HessianNumber, Real) at /home/travis/.julia/v0.4/ForwardDiff/src/HessianNumber.jl:268
is ambiguous with: 
    atan2(Real, ForwardDiff.HessianNumber) at /home/travis/.julia/v0.4/ForwardDiff/src/HessianNumber.jl:268.
To fix, define 
    atan2(ForwardDiff.HessianNumber, ForwardDiff.HessianNumber)
before the new definition.
WARNING: New definition 
    *(Real, ForwardDiff.TensorNumber) at /home/travis/.julia/v0.4/ForwardDiff/src/TensorNumber.jl:107
is ambiguous with: 
    *(ForwardDiff.TensorNumber, Real) at /home/travis/.julia/v0.4/ForwardDiff/src/TensorNumber.jl:106.
To fix, define 
    *(ForwardDiff.TensorNumber, ForwardDiff.TensorNumber)
before the new definition.
WARNING: New definition 
    /(Real, ForwardDiff.TensorNumber) at /home/travis/.julia/v0.4/ForwardDiff/src/TensorNumber.jl:142
is ambiguous with: 
    /(ForwardDiff.TensorNumber, Real) at /home/travis/.julia/v0.4/ForwardDiff/src/TensorNumber.jl:139.
To fix, define 
    /(ForwardDiff.TensorNumber, ForwardDiff.TensorNumber)
before the new definition.
WARNING: New definition 
    ^(Real, ForwardDiff.TensorNumber) at /home/travis/.julia/v0.4/ForwardDiff/src/TensorNumber.jl:211
is ambiguous with: 
    ^(ForwardDiff.TensorNumber, Real) at /home/travis/.julia/v0.4/ForwardDiff/src/TensorNumber.jl:197.
To fix, define 
    ^(ForwardDiff.TensorNumber, ForwardDiff.TensorNumber)
before the new definition.
WARNING: New definition 
    atan2(ForwardDiff.TensorNumber, Real) at /home/travis/.julia/v0.4/ForwardDiff/src/TensorNumber.jl:332
is ambiguous with: 
    atan2(Real, ForwardDiff.TensorNumber) at /home/travis/.julia/v0.4/ForwardDiff/src/TensorNumber.jl:332.
To fix, define 
    atan2(ForwardDiff.TensorNumber, ForwardDiff.TensorNumber)
before the new definition.

[jrevels]

This was fixed in #120, we still need to tag a new version though. I'll do that now.