Consider LocalTime as the only local object.
add to CHANGELOG use of tasty
add way to get the system local date.
Merge branch 'master' into dev1
Various experiment with types

* add types for hours/minutes.
* make everything int64.
* add a TimeInterval class.
* split timediff into period and duration.
Don't spell the spanish way.
keep track of CHANGES
remove commented code
reformat line
Adjustment with local/global parsing
Adjust hours/minute/seconds, duration,seconds for tests
fix comment
bump version to 0.2.0
add class description
add a description for durationFlatten