removed error for serialization, files are empty anyways
add accuracy parameter for ascii seiralization since its lossy
activate ascii serialization tests
activate hdf5 since it works
removed spaces from parameter names that are registered
only allow alnum and underscore for registered parameter names
introduce accuracy for xml serialization equal tests
activate XML serialization since it works
added accuracy for template classes
json seems to have a low accuracy
activate json since most things are working
replace warning by error since otherwise shogun runs into uninitialized memory problems