Moving custom logger to "web" package
Revert "Moving custom logger to "web" package"

This reverts commit aa08778afa94025fe27606cd9ccea9800b10ba86.
Moving custom logger to "web" package
Removing core system submodule
Renaming project to match core system
Revert "Renaming project to match core system"

This reverts commit 1b40e985489baddc728f1e7e0d1bd9f05c68b726.
"Pikater-core" project is now required

Added a classpath dependency (same workspace) to pikater core ("PC"). Pikater vaadin ("PV") now requires:
* PC's compiled classes (bin folder).
* PC's special dependencies which can not be integrated via Ivy and are required in PV.
* PV's Ivy now extends PC's Ivy.
Various cleaning & fixes
Various cleaning & fixes once more
First documentation revision

A lot more is needed...