Squashed commit of the following:

commit b464d7f815a873083f6041504e7cb0130c927031
Author: Qiming Sun <osirpt.sun@gmail.com>
Date:   Sat Apr 12 15:40:36 2014 -0400

    add simple test for wavefunction

commit ca28fa5e207095dc83ec73783f49aa2028bcb77d
Author: Qiming Sun <osirpt.sun@gmail.com>
Date:   Sat Apr 12 15:18:23 2014 -0400

    fix few bugs

commit 26920065d8c26f9f51ee8808df440b94301a3bef
Author: Qiming Sun <osirpt.sun@gmail.com>
Date:   Sat Apr 12 14:44:32 2014 -0400

    add high level wrapper. before test
Merge branch 'master' into dev-sqm
add make_rotmat
add interface to TensorProduct
add function StateInfo.CollectQuanta
finish most cython functions
fix compile problem
finish InitStartingBlock
before debug RenormaliseFrom
pass startup
fix problems in load function
one sweep correct
no crash now
add feature save
running no crash, results incorrect