has -> haskey
fix typo in readme
add convenient add_qpterms! so users don't need to convert
for consistency, actually require Float64 vectors
same for add_constr
add interface for quadratic constraints
update tests
Merge pull request #3 from mlubin/master

quadratic constraints + minor fixes
Merge pull request #1 from IainNZ/master

Added ! in documentation for param setters
readme fixes/updates
typo fix
Merge pull request #4 from mlubin/master

readme fixes
Exposed add_rangeconstr! and started on interface