add converter functions from cxxtools::Timespan to microseconds, milliseconds, seconds, minutes hours and days
fix timeout handling of cxxtools::Condition::wait
rework cxxtools::Timespan object and create WeakTimespan objects with implicit conversions
use cxxtools::Timespan to specify timeout in remote client and selector
fix timespan unittest
use timespan in cxxtools::Remoteprocedure::end to specify timeout also
add documentation to cxxtools::Timespan
fix rounding problem in timespan unit test
fix typo in comment
simplyfy iterator of cxxtools::SerializationInfo and add some documentation
Merge branch 'master' of https://github.com/maekitalo/cxxtools
improve documentation of cxxtools::Timespan
update documentation
change format %J in time and datetime to use always 3 digits
change format %J back to its original format and add %K for 3 digits milliseconds in time and datetime format
add %K format specifier to datetime and time parser as in formatter
add format sepcifier 'k' for fixed 3 digit milliseconds to cxxtools::Time and cxxtools::Datetime
fix netcat demo program: omitting ip switch -i must not lead to a crash
add serialization howto document
Merge branch 'master' of https://github.com/maekitalo/cxxtools