fix eseries and Qobj.eigenstates: need to specify dtype=object
fix bug reported in #228: related to ndarrays with qobj instances as values (without specifying dtype=object)
use numpy arrays instead of python lists
fix array issues by adding dtype=object
fix array issues in unit tests by adding dtype=object
fixed numpy 1.9 compatibility problems in mcsolve. removed excessive casting to array
fixed numpy array dtype bug in eseries
made compatible with np 1.9
Merge pull request #229 from jrjohansson/numpy-1.9-compatibility-issues

fix eseries and Qobj.eigenstates: need to specify dtype=object