Added Lato import from google fonts
Minro changes to sparse profile
Added randomized sp_profile tests
FIXED: Sparse profile requires int64 dtypes

Ran into overflow issues giving negative results for profile on larger
problems.
Merge pull request #212 from jrjohansson/fix-toffoli-cnot-expansion

qip.circuit updates
Updated steadystate

- Changed drop_tol and fill_factor to more accurate values
- Added ability to pass guess for solution vector to iterative methods.
- Added condest check to preconditioner debugging.
Added ability to reuse a preconditioner
Revert "Added ability to reuse a preconditioner"

This reverts commit 8e396a945c698cb2f3454381ab4081ab9504b179.
Calculate separate iteration time
restore 'iterative-bicg' and 'iterative-bicgstab' as possible interative solvers (they are still included in the docstrings, so they must either be restored or removed from the docstrings if there is no reason to support them)
update docstring
Merge pull request #214 from jrjohansson/restore-bicg-bicgstab

restore 'iterative-bicg' and 'iterative-bicgstab' as possible iterative solvers