Added client identification to the XML which will be uploaded to the server
backupID has is now from datatype long, using QTemporaryFile for local scheduler.xml, backupStarted.xml and backupEnded.xml
Modifications after reviewing the code with dev-zero
About dialog redesigned

* Removed images from copyright and development company
* Put 'Copyright by' and 'Developed by' on the same line
* Use Sepiola logo if no reseller is set
Removed unused include
Default application shows name and version on the lefthand side of the logo
About dialog redesigned
Add #ifdefs to build static OS identifier string.