Set uniform way to set image data type.
New API for handling image operations
Merge branch 'master' of
https://weasis.repositoryhosting.com/git/weasis/weasis-dev.git

Conflicts:
	weasis-core/weasis-core-ui/src/main/java/org/weasis/core/ui/editor/image/DefaultView2d.java
Fix preprocessing change issue
Make the splash screen link external
Allows to change image logos and name
Change error tag to message

Conflicts:
	weasis-dicom/weasis-dicom-explorer/src/main/java/org/weasis/dicom/explorer/wado/DownloadManager.java
change minOccurs="0" for Patient TAG in wado XSD 
so Message TAG can be alone
Add xchart lib. Update FileFormatFilter
Prefers StringBuilder where synchronization is not required
Fix print issue, scroll in base viewer2d. Lock update when several image
operations. Improve zoom capabilities (add real world size)
Use rendered image when possible
Fix nullpointer in W/L. Fix removing Op in SimpleOpManager.
Remove xchart dependency
Make effect for modal dialog. Fix unsigned short issue.
Fix building unsigned short series in MPR
Make fade effect smother.