New doc section for super_tensor, composite and tensor_contract.
Merge pull request #15 from jrjohansson/updates-docs-3.1.0

Updates docs 3.1.0
Added note on new tensor functions.
updates to docs
doc updates

- updates to css
- macports installation updates
Merge pull request #16 from cgranade/doc-tensor

New doc section for super_tensor, composite and tensor_contract.
Merge pull request #17 from jrjohansson/updates-docs-3.1.0

updated function/classes indices
doc updates

- Replace static code in dynamics with ipython calls
More code moved to ipython
doc updates
updated contributors file