Simple editor preview part implemented
Hard refactoring done. Architecture now is vpe-like.

restored selection bar(but it has a bug)
restored text formatting bar on visual part(disabled for now)
restored editor rotation
JBIDE-16925 Switch preview engine for new implementation of visual editor

implemented choosing of correct visual part
Fixing VPE tests
Moving new editor implementation to separate plugin.
Adding possibility to use only VPE engine in tests
Fix build structure:
1. Externalize strings
2. Correct group names
3. Update build.properties to fix build issues
4. Update plugin name preview -> preview.editor
[JBIDE-17262] Visual Preview Throws socket exceptions

See details in https://issues.jboss.org/browse/JBIDE-17262
JBIDE-17298 NPE when opening preview tab

fixed
Added action bars from preview to visual editor
Fix vpe tests errors
Restore tests/pom.xml
Fix tests on jenkins
Removing unused import
navigation from visual part to source part added
fixed links bloking for target=_blank
JBIDE-17305 Usage stats for visual page editor/preview/browsersim
JBDS-2899 - Cannot run internal browser on RHEL6 with JBDS8.alpha2
Update GTK3 detection for vpe/vpv
Visual Page Editor: Visual tab is not refreshing

fixed

Conflicts:
	plugins/org.jboss.tools.vpe.preview.editor/src/org/jboss/tools/vpe/preview/editor/VpvEditor.java
Add missing icons
remove annoying info logs from view