fixed some of the relative imports and also one of the circular ones
I Think I solved the division problem
minor fix in solving the python3 division problem
minor fixed __hash__ for expression for python3
BUG: conversion from scipy sparse matrix to numpy ndarray
working on params
refactoring matrix data refactor
Merge branch 'master' of github.com:cvxgrp/cvxpy

* 'master' of github.com:cvxgrp/cvxpy:
  Added example of fitting censored data
got params almost working
got params working
made problems mutable again
moved check for valid cache
added version number
Merge pull request #136 from argriffing/sparse-matrix-conversion

BUG: conversion from scipy sparse matrix to numpy ndarray
fixed bug with parameter only constraints
Merge branch 'master' of github.com:cvxgrp/cvxpy

* 'master' of github.com:cvxgrp/cvxpy:
  BUG: conversion from scipy sparse matrix to numpy ndarray
added callback param, removed constant atom
added test for converting between matrix types
added test for quad form
updated dependencies