Privatize global and publicize docs

Fix signals for GI

Combine the libraries from the GTK3 bundle with GTK from the GTK2 one
to get newer GLib & co for GTK2 builds.

If possible, register signals with the proper argument types (boxed or gobject).
This is required for successful introspection of the signals and important
for GI-based plugins.

As for the marshallers, if available use a predefined one from glib. Otherwise
use the generic marshaller available since 2.30 (in theory all signals could
use that one but it has a bit of overhead).

This builds on the gboxed conversions of earlier commits.

This also bumps the minimum glib requirement.
 - g_cclosure_marshal_generic requires 2.30 (if NULL is passed as marshaller
   to g_signal_new())
 - G_TYPE_KEYFILE requires 2.32

geany.desktop.in: Add Keywords field entry

Fix undo of line end type change

Simply call ui_update_statusbar() and ui_document_show_hide() like in
other undo actions.

At the moment undo of line end type change only undos the changes made
in the document but the different line ending settings remains active.

This patch fixes the issue by combining the line end scintilla undo action
with a new UNDO_EOL action responsible for updating the line ending
settings.

Fixes #409

Updated scintilla_changes.patch accordingly

geanyobject can be used by plugins to connect to plugin signals directly
(required for GI-based plugins). Access through GeanyData::object. The related
doxygen comments are @gironly for now, since plugin_signal_connect() is still
preferred.

Finally, the useless function pointer prototypes are removed from the
GeanyObjectClass structure as they became useless (they have been unused and
generally wrong since ever).

GeanyObject signals require GTypes to be gobject-introspection compatible.

GeanyObject signals require GTypes to be gobject-introspection compatible.

GeanyObject signals require GTypes to be gobject-introspection compatible.

Allow spawn debug output also with GEANY_DEBUG

Win32: Add UI error message if an URL could not be opened

Improve error message on Build->Run errors

Reword the error message and use the full executed command line
in the error message, not only the configured Terminal command.

Fixes #1077.

This entry matches the `Keywords` field in Gedit.

Change array type syntax in Java file template

Square brackets following the element type are more common.

TM: Fix actually running the mapping self-tests

Enable buffered draw on newer GTK versions on OS X

Improve Goto Symbol popup contents

Treat the "h" extension as a C++ file

TagManager cleanups

Since the original include list is already reordered by the hash table,
it makes no sense to reverse the resulting list as it's in a different
order anyway.

Shouldn't collide with real tag kind symbols and a non-visible character
is more probably unused by ctags than a visible one.

Even when we know when should be searching for definition (or declaration),
we can keep searching for the opposite type too when we didn't find
anything with the "correct" def/decl type. So at least we find "something"
of that name.

javascript: Add ECMAScript 6 classes keywords