Update RedDeer version to 0.7.0-SNAPSHOT

0.6.0 is dead, long live 0.7.0
Create method setCursorPosition(int, int) in TexEditor. Fixes #796
AnnotationsFinder finds annotations of super classes #816
Increased timeout of Eclipse tests to 2 hours

The eclipse tests reached the previous limit again (90 min),
so I'm increasing the timeout again, to 2 hours.
Fix screenshot issues (fixes #781)
Removed API deprecated in 0.6.0 and earlier. Fixes #822.
Implemented method remove() in ServerModule. Fixes #799
Added icons folder into build (fixes #821)
Deprecated ok method from preference page. Fixes #823
Wait for shell when opening preferences page. Fixes #825
wait contition for validation markers. Fixes #824
Improve RedDeer update site layout #831

As described in the task, I created additional groups
in the RedDeer site:
Runtime/API
UI
Tests/Examples
Sources
Dont open preference dialog when select method is called. Fixes #826
Performed clean-up on AbstractView (fixes #767)
Closes Secure Storage shell if opened during RepoConnectionDialogTest. Fixess #840
Adds possibity to manage view containig project from within project itself
Fixes: #839
DefaultTreeItem constructors refactored. Fixes #837
Adds method getTitle() to WorkbenchPart. Fixes #836
Added condition to check if project contains project item. #844
Adds JUnit extension to never open associted perspective.Fixes #842