Adding manually created FITS file for Bsplines
Adding BSplineWCS and test case for linear spline
Fixing tests
Adding IRAF subclass for handling trasformation of pixel coordinates
Merge branch 'adding-spline-model' into adding-bspline-fits-readers
Changing class method to static method in BSplineModel
Adding IRAF WCS, and fixing npieces attribute name in BSplineModel
Merge branch 'placeholder' into adding-bspline-fits-readers
Converting class factory method in BSplineModel to init and fixing test cases accordingly; adding IRAF WCS for transformations and changing calls from normal to IRAF WCS
Changed xrange from standard python to six.moves.xrange
Adding comment
Reverting BSplineModel changes
Reverting BSplineModel tests
Adding class methods to BSpline subclasses
Now BSplineModel tests are ignored if astropy version is less than 0.4.x
Adding astropy-dev + scipy test in travis
Changing xrange to six.moves.xrange for 2to3 compatibility
Changing xrange to range because module six is not found
Merge pull request #77 from shaileshahuja/skip-tests

Need to skip some tests if astropy 0.3.x is being used
Adding from_data class method in IRAFSpline class, changing name of n_pieces to num_parameters in BSplineModel