Fix rst doctests in io.ascii
Attempt to fix doctest for fixed width table
Merge pull request #17 from hamogu/mdboom/doctest/io-ascii-2

Attempt to fix doctest for fixed width table
Merge pull request #1744 from mdboom/doctest/io-ascii-2

Broken rst doctest in io.ascii
fix for bounds with older versions of scipy
Fix a bug in NonLinearLSQFitter which returned the origin model instead of the copy
Modify error message to handle python 3 and scipy < 0.12