Bugfix in fortran_float(): would return NaN for blank strings- now returns zero
Further revision to fortran_float() function- could fail for negative numbers with missing E exponent signifier
Merge branch 'testing'
Fixed minor error in mulgrids layer_plot() documentation
Version 1.3.8
Added optional parameter to line_projection() method in geometry.py, so that it can return non-dimensional distance between the line start and line end of the projected point