Changes from 2.0.0beta3 to 2.1.0beta1

*Bugs*

- Fixed proper importing of headers in documents converted from Word
- Fixed hardcoding of settings into ini-files
- Fixed concurrency problems in conversion by using unique names for each document
- Fixed better error handling when exporting object

*Enhancements*

- Added cleanup routines for uploaded files- Improved image handling when importing using popup option
- Simplyfied and corrected code for image handling
- Added checking of access rights for inline images
- Changed direct sql statements from ezooimport to use fetch-function (should now work with other database)
- Added access control (partially implemented, still some issues when uploading images in document)
- Changed import errorhandling to be more consistent
