Changed martix representation to a maximum of 8 columns and rows
Changed martix representation to a maximum of 10 columns and rows and changed pmatrix to array
Merge pull request #169 from anubhavvardhan/quantum_circuit

Changed martix representation to a maximum of 8 columns and rows
added unit test for Qobj.sqrtm
fix bug in Qobj.sqrtm
fixed name of unit test for Qobj.sqrtm
Merge pull request #170 from jrjohansson/fix-sp_eigs-convention

Fix but in sqrtm
fix bug that was introduced with recent addition of array based td formats, which only works for args of type dict, while for backwards compatibility we need to also support args in e.g. type list.
Merge pull request #171 from jrjohansson/fix-td-format-args-type

fix bug that was introduced with recent addition of array based td formats
merged master