add unicode comparison support in macros
AppVeyor fix CC @tkelman
Merge pull request #174 from JuliaOpt/unicode_operators

add unicode comparison support in macros
prep for 0.5.2
Merge branch 'master' of github.com:JuliaOpt/JuMP.jl
Only run code coverage after success already established - won't affect Travis results
Merge branch 'master' into defVarRefactor