remapping of log levels

as the underlying logentries library only supports a very strict set of
log levels there may emerge potential conflicts.
e.g. the default winston levels are 'warn' and 'error' whereas the
logentries library only accepts 'warning' and 'err'.

this commit optimistically matches 'warn' and 'error' to 'warning' and
'error'
Minor CoffeeScript clean up
1.0.1