Consolidate base utility libraries into libeutil.

Evolution consists of entirely too many small utility libraries, which
increases linking and loading time, places a burden on higher layers of
the application (e.g. modules) which has to remember to link to all the
small in-tree utility libraries, and makes it difficult to generate API
documentation for these utility libraries in one Gtk-Doc module.

Merge the following utility libraries under the umbrella of libeutil,
and enforce a single-include policy on libeutil so we can reorganize
the files as desired without disrupting its pseudo-public API.

   libemail-utils/libemail-utils.la
   libevolution-utils/libevolution-utils.la
   filter/libfilter.la
   widgets/e-timezone-dialog/libetimezonedialog.la
   widgets/menus/libmenus.la
   widgets/misc/libemiscwidgets.la
   widgets/table/libetable.la
   widgets/text/libetext.la

This also merges libedataserverui from the Evolution-Data-Server module,
since Evolution is its only consumer nowadays, and I'd like to make some
improvements to those APIs without concern for backward-compatibility.

And finally, start a Gtk-Doc module for libeutil.  It's going to be a
project just getting all the symbols _listed_ much less _documented_.
But the skeletal structure is in place and I'm off to a good start.

1 files changed, 28 insertions, 0 deletions

diff --git a/e-util/widgets.error.xml b/e-util/widgets.error.xml
new file mode 100644
index 0000000000..efaa41c42e
--- /dev/null
+++ b/e-util/widgets.error.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<error-list domain="widgets">
+
+  <error id="ask-signature-changed" type="question" default="GTK_RESPONSE_YES">
+    <_primary>Do you wish to save your changes?</_primary>
+    <_secondary xml:space="preserve">This signature has been changed, but has not been saved.</_secondary>
+    <button _label="_Discard changes" response="GTK_RESPONSE_NO"/>
+    <button stock="gtk-cancel" response="GTK_RESPONSE_CANCEL"/>
+    <button stock="gtk-save" response="GTK_RESPONSE_YES"/>
+  </error>
+
+  <error id="blank-signature" type="error">
+    <_primary>Blank Signature</_primary>
+    <_secondary>Please provide an unique name to identify this signature.</_secondary>
+  </error>
+
+  <error id="no-load-signature" type="error">
+    <_primary>Could not load signature.</_primary>
+    <secondary xml:space="preserve">{0}</secondary>
+  </error>
+
+  <error id="no-save-signature" type="error">
+    <_primary>Could not save signature.</_primary>
+    <secondary xml:space="preserve">{0}</secondary>
+  </error>
+
+</error-list>
+