bug fix

. tail was reversed
. filename was missing
add attributes and methods, bug fixes

. Station: bug fixes, add yearly() and setup() which is a wrapper
. Network: bug fixes, add skip_years, setup() stations_number
. Submission: bug fixes, add stations_number and networks_number
use new classes from costhome

crmse_cl
crmses_station_cl
crmse_network_cl
crmse_submission_cl