fix argument name
[timers] Specify @module and @submodule for API docs

It needs to shows the correct provided module name.

Fix #1669.
[timers] Move the module description

The module description moves from prologue.js to epilogue.js. Otherwise
the module's index will be empty.
[calendar] very_short_weekdays fallback to datatype-date-format langage data

Both shortWeekDays and weekDays will be localized at least datatype-date-format
is available in specified language. Fix #1796.
[calendar] Tweak the indent
[io] Add documentation for Y.io and IO.send return values
Merge remote-tracking branch 'origin/live-docs' into dev-master
Merge branch 'fix1796' into dev-master
[calendar] Update HISTORY
[calendar] Build
Fix Y.Log() error to be Y.log()
[widget-modality] Update HISTORY
[widget-modality] Build
fixed local getElementsByClassName, uncommented and fixed applicable tests
Merge remote-tracking branch 'upstream/live-docs' into live-docs
fix comment block for HistoryBase.add()
Merge remote-tracking branch 'jafl/live-docs' into live-docs
[history] Build
Merge branch 'live-docs' into dev-master
fixes #1913