* Add:xml:Configure null traffic plugin by default

Signed-off-by: mvglasow <michael -at- vonglasow.com>

* Add:port/android:Enable traff_android by default

Signed-off-by: mvglasow <michael -at- vonglasow.com>

Layouts contain quite heavy xml code, and there are many layouts available for navit.
They are all inserted inside the main navit.xml, which makes it hard to edit because of its size, even if changes or customizations by users are very rarely on the layout code.
I have thus moved the layout code away from navit.xml, each layout having its own xml definition file, called navit_layout_*.xml
These files are inserted inside the main navit.xml file by using the already existing xi:include mechanism, this also allow for backwards compatibility (old monolithic navit.xml files are still valid and can be used).
The other advantage for this is that f the user wants to have his/her own customized navit.xml, he/she can still include the shipped layout files, making their xml lighter. This also allow to enable/disable specific layouts easily by including or not each layout file.
It is also easier to perform side-by-side comparison between two layout files.

* doc/comments: fix typo: chosen not choosen

* doc/comments: fix typo: truncated not trucated

* doc/comments: fix typo: unknown not unkown

* doc/comments: fix typo: attribute not atribute

* doc/comments: fix typo: Convenience not Convinience

* doc/comments: fix typo: forbidden not forbiden

* doc/comments: fix typo: government not goverment

* baud to baudrate

* We dont need empty files which cause confusion

* Remove README because its an old and not uptodate one

* Useless file

* as its dummy we probably dont need it

* Remove files from onld build system.

* Fix Cpack build

Deleted lines have no sense at all as we have no popup_printf_cb function.
Android version crashes at start if dbg_level attribute of any <debug> element set to "debug".