Site build is broken due to change in build config

[Hjdskes]

Since #18, the site build is broken. Individually, the sites build correctly (although the Eclipse plugin module's site needs to be build with mvn clean package site (optionally site:stage as well)). It's just that staging the core and console modules' sites into the aggregator does not correctly link between the modules.

Another issue then, is that the Eclipse plugin module's site needs to be build separately (due to the fact that Tycho and reactor builds do not cooperate) which means we need to merge the sites manually.

[Hjdskes]

Currently there is no reactor build anymore. All sites can be generated separately, but have to be combined somehow.