Merge pull request #10 from tkralphs/master

Adding zip_safe flag and re-running Cython
CyClpSimplex: objective offset
Faster QP read
CyClpSimplex: objectiveCoefficients
Using dense vector to speedup setting the objective function in CyLPModel
Cython generated files corrected (again)
3-digit versioning system, similar to COIN projects
merged in dev
Cython generated files corrected
Cython generated files conflict resolved
Faster addConstraint()
presolve fixed for primal and dual
Independent binaries for mac. Mavericks issue fixed (again)
CyClpSimplex, evaluateAt, gradientAt
Initialsolve fix for QPs
scaling for csr and csc
scaling for CyClpSimpex
Hessian attribute fixed. Setup Mavericks reconition bettered.
variablesLower and Upper dimension fixed.
__version__ added.