Modified fortran_float() function to handle embedded spaces, D specifier and exponent overflow; added optional blank_value parameter; moved it from mulgrids.py to fixed_format_file.py; added similar fortran_int() function; used these for reading all input (mulgrid and t2data) as well as output
Added read_function parameter to init method of mulgrid and t2data classes; reorganised read_function code in fixed_format_file module
Bugfix in t2data: had to specify default value for new read_function parameter in init method of t2data_parser and t2_extra_precision_data_parser classes