Release notes: small fixes

- Fixed a typo.
- Changed "Buehlmann" to "Buhlmann".
- Added "Experimental" to the announcement of deco calculation.
- Since most of the text seemed to be written for 76 chars width,
  I did the same for the last few lines that exceeded that.

Signed-off-by: Reinout Hoornweg <reinout@xs4all.nl>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Documentation: Consistent spelling of "Buhlmann"

Replaced "Bühlmann" with "Buhlmann".

Signed-off-by: Reinout Hoornweg <reinout@xs4all.nl>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Fixed an incorrect by context translation in bg_BG

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Fixed a memory leak in the divelist when moving with the keyboard

There were some small leaks before here, related to gtk_tree_iter_copy(),
but there is another one in select_next_dive():
nextiter = gtk_tree_iter_copy(iter);

This now requires a SJ near the epilog where we do the memory cleanup.
Lets call this similar label consistently "free_iter" between
select_prev_dive and select_next_dive.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Unref the two GtkTreeStore instances when destroying the divelist

Even if these exists for the heap lifespan, we can call:
g_object_unref(dive_list.treemodel);
g_object_unref(dive_list.listmodel);

in divelist.c:dive_list_destroy()

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
info.c: add a method to clear all GtkListStore allocations

Add a new method in info.c called info_widget_destroy(), which
clears all GtkListStore instances. The method is exposed via
display-gtk.h and called from gtk-gui.c:on_destroy().

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
gps.c: Fixed a small memory leak

osm_gps_map_get_default_cache_directory() uses stdc:strdup to allocate
memory for the returned string. Lets try to free the memory
pointed by 'cachebasedir'.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
parse-xml.c: fixed a small memory leak related to xmlGetProp()

test_xslt_transforms():
xmlGetProp uses strdup(), so we have to clear the memory if a pointer
is returned.

xmlFree() doesn't seem very portable (strangly enought), so we
use free(..) directly.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>