Generate the docstrings in _wcs.so using character arrays rather than
string literals.  This is (reportedly) more portable and avoid the
copying nonsense we did before.
Fix CONSTRAINTS_DOC formatting in modeling docs
vos_catalog.py: fix use of format() for compat with python 2.6
another {} format() problem in test_cosmology
status -> "param_jac" in NonLinearLSQFitter
Add param_cov to fit_info
Added  documentation for `fit_info`
Added test for param_cov
fix error in errorfunc usage revealed by tests
change param_jac to cov_x, because it's not really a jacobian
Changing FITS table write function to have default value of Nan for float type cols
Changing default value for float columns from 1e20 to Nan in fits table write function
Changing the float comparison for filled value to np.allclose to enable Nan masking for float32 as well. Also added test cases for float64, and float32
Don't fail -P if docs missing
Update docguide.rst

typo fix
Restructure front documentation page to emphasize contributions rather than development
Example of reworked documentation aimed at beginners
Clarify language in several places
Change line breaks to keep length under 80 characters
Fix typographical errors