render: clear path after rendering
debug: use G_GNUC_PRINTF for debug functions

And fix a legitimate warning.
debug: add a missing G_GNUC_PRINTF
all: fix deprecation warnings related to g_type_init
svg_view: avoid a crash in case of NULL x or y parameter in _show_text
svg_style: remove unused code
dom_test: uncomment wrongly unused code and fix node owner check
itex: use gsize type instead if int for data size

Fix for https://bugzilla.gnome.org/show_bug.cgi?id=730284.
dom: use gsize type for data size parameter
licence: date update
dom: revert to use -1 as value for NULL terminated buffer

That is consistant with what glib does. The issue in bug
730284 regarding itex2MML_parse seems not correct, as
the value passed to itex is the result of strlen if size
is negative.
Add nb
Added Norwegian bokmål translation