Bug 453528 - The E4 spies should be packed in only one feature

+ Added spies feature
+ Added model spy feature w includes the live editor
+ Changed category for update site
+ Added new modules to parent pom
+ removed live editor from core

Change-Id: I7d9e0f710b6dda29085e9c23d28ef8f9114debdb
Signed-off-by: Wim Jongman <wim.jongman@remainsoftware.com>