changed the location of comments
Merge branch 'master' of http://github.com/jrjohansson/sympy-quantum-notebooks
Merge branch 'master' of http://github.com/jrjohansson/sympy-quantum-notebooks

Conflicts:
	sympy_quantum_extra.py
resolved duplicates
added a tag to specify whether add should be expanded in pull_outwards
Merge branch 'master' of http://github.com/jrjohansson/sympy-quantum-notebooks

Conflicts:
	sympy_quantum_extra.py
modified push_inwards to work in Sum
modified pull_outwards so as to work for Sum class. added sum_pow_expand function
resolved diverged fork
Merge pull request #5 from eunjongkim/master

updated sympy_quantum_extra.py