Extract functions LDT_from_date_time and LDT_from_date_daypart
to avoid duplicate code. Handle date-times in start-of-DST transitions
and better handle those in end-of-DST transitions. Test the results.
Also Bug 791825 - Accounting Period dates off by 1.
The DST start/end dates were reversed *and* the DST offset had the wrong
sign in Windows, resulting in the effective timezone always being one to
the west off (i.e. PDT was -9 and PST was -8).
It is split into
- /libgnucash (for the non-gui bits)
- /gnucash (for the gui)
- /common (misc source files used by both)
- /bindings (currently only holds python bindings)
This is the first step in restructuring the code. It will need much
more fine tuning later on.
