Gwenhywfar

GWEN_BUFFER: Always allocate one byte more than needed.

This should allow for adding a zero character to use the content of
GWEN_BUFFER as string.

Config of gtk3 gui: Allow slightly lower minimum gtk3 version which seems to compile fine.

Also, if gtk3 is not found, really stop the config as otherwise
we will have missing GTK3_INCLUDE flags.
Also, let travis build this gui as well.

Merge branch 'branch-4'

The only actual change in this merge commit is the last
travis config change 210ec98c. Such a merge is just
somewhat easier to read than a lot of cherry-picking, IMHO.

Update travis config so that gtk can be built as well.

Update travis config so that gtk can be built as well.

Fixed release version.

Added Makefile.cvs target "mp-opt".

Increased GWEN_IDTABLE64_MAXENTRIES to 64 (from 32).

Major speedup of GWEN_IdList64_AddId().

GWEN_IdList64_AddId() now just adds a new id to the last table. If that
table is empty, a new table is appended and the id added to it.

Added APIDOC for GWEN_Time_new().

Prepared release 4.19.0.

Makefile: Build gtk3 frontend, too.

Fix all Gtk3 deprecation warnings.

Except gtk_tree_view_set_rules_hint, where the warning is instead
suppressed.

Fix Gtk3 API Change Errors.

Gtk3 now compiles, though with deprecation warnings.

Initial creation of gtk3 gui.

Fixed a warning.

Changed TAG to "git".

Makefile: Build gtk3 frontend, too.

Fix all Gtk3 deprecation warnings.

Except gtk_tree_view_set_rules_hint, where the warning is instead
suppressed.

Fix Gtk3 API Change Errors.

Gtk3 now compiles, though with deprecation warnings.

Initial creation of gtk3 gui.

Add logging of HTTP command, status and header.

Fixed astyle params, rebuild built files.

Prepared release 4.18.0.

Fixed warnings on deprecated gnutls types.