GO Contact Sync Mod Code

CHANGE:

- uncomment AssemblyFileVersion-property to get the same version as AssemblyVersion
- if we deploy a new setup we have to change the version number to that version to
automatically update the setup process - so we don´t need to uninstall the previous
version manually
if we change the version we (vss makes this for us) create a new product code and
the upgrade code is the same - we don`t touch this

Improvement: Sync also State and PostOfficeBox, see Tracker item https://sourceforge.net/tracker/?func=detail&aid=3276467&group_id=369321&atid=1539126

Removed unnecessary constructors

Fix: set SyncDelete at every SyncStart to avoid "Skipped deletion" warnings, though Sync Deletion checkbox was checked

improved error handling for NullReferenceExceptions

added comment to explain \r\n replacement

changed version to 3.4.1

Improvement: Show internet connection problems only in Balloon and Logger, don't show modal window, to continue syncing after Hibernating

change:
- wait 90 seconds after start before
(let slow computer load network and outlook)

fix:
- allow only one instance of the program to prevent exception
(log-file exclusively locked from first instance)