rename file
first steps
new S3 class loglevel

- a wrapped factor of 5 levels
- comparison with number still works, but a log level is not equal to a number -- test had to be adapted
function as.loglevel
level.logger operates with objects of class loglevel
create.logger operates with objects of class loglevel
explain verbosity
Roxygenize
add more acceptance tests for not creating a log file
as.character.loglevel; fix as.numeric.loglevel
tests for loglevel
unite documentation for logging functions; new function levellog
use named logging levels instead of ::: notation
Roxygenize
unite documentation for logformat.logger; now is properly exported as S3 method
remove ::: notation from README
prefer single quotes
Roxygenize
consolidate, combine documentation, deprecate ::: in docs
update NEWS