* Remove Makefile.
* Add tcl/main.tcl with mandatory functions.
* change tcl to create the GT wizard.

After check, the line rate is exactly 2.125 Gbps (20*106.25MHz)

This modification are probably transparent. But it's better to be
accurate.

* Also update the Makefile

* GTHE COMMON must be outside IP (QPLL needed for other interfaces)
* GTWizard created with TCL
* GTWizard instantiated directly in top level

* Remove package and XCI
* The parametrization will be made somehow differently