Fixing issues with i18n stuff:

- Make gettext stuff draw-time. so switching between languages
  can happens without restart now.
- Added option to translate visible interface (menus, buttons, labels)
  and tooltips. Now it's possible to have english UI and localized tooltips.
- Clean-up sources, do not use gettext stuff for things which can be
  collected with RNA.
- Fix issues with windows 64bit and ru_RU locale on my desktop
  (it was codepage issue).
- Added operator "Get Messages" which generates new text block with
  with all strings collected from RNA.
- Changed script for updating blender.pot so now it appends
  messages collected from rna to automatically gathered messages.
  To update .pot you have to re-generate messages.txt using "Get Messages"
  operator and then run update_pot script.
- Clean up old translation stuff which wasn't used and most probably
  wouldn't be used.
- Return back "International Fonts" option, so if it's disabled, no
  gettext lookups happens on draw.
- Merged read_homefile function back. No need in splitting it.

TODO:
- Custom fonts and font size.
  Current font isn't nice at least for russian locale, it's
  difficult to read it.
- Put references to messages.txt so gettext can merge translation when
  name/description of some property changes.

release/scripts/startup/bl_ui/properties_data_curve.py

@@ -116,7 +116,7 @@ class DATA_PT_shape_curve(CurveButtonsPanel, Panel):
 
 
 class DATA_PT_curve_texture_space(CurveButtonsPanel, Panel):
-    bl_label = _("Texture Space")
+    bl_label = "Texture Space"
     bl_options = {'DEFAULT_CLOSED'}
     COMPAT_ENGINES = {'BLENDER_RENDER', 'BLENDER_GAME'}
 
@@ -135,7 +135,7 @@ class DATA_PT_curve_texture_space(CurveButtonsPanel, Panel):
 
 
 class DATA_PT_geometry_curve(CurveButtonsPanel, Panel):
-    bl_label = _("Geometry")
+    bl_label = "Geometry"
 
     @classmethod
     def poll(cls, context):
@@ -168,7 +168,7 @@ class DATA_PT_geometry_curve(CurveButtonsPanel, Panel):
 
 
 class DATA_PT_pathanim(CurveButtonsPanelCurve, Panel):
-    bl_label = _("Path Animation")
+    bl_label = "Path Animation"
 
     def draw_header(self, context):
         curve = context.curve
@@ -199,7 +199,7 @@ class DATA_PT_pathanim(CurveButtonsPanelCurve, Panel):
 
 
 class DATA_PT_active_spline(CurveButtonsPanelActive, Panel):
-    bl_label = _("Active Spline")
+    bl_label = "Active Spline"
 
     def draw(self, context):
         layout = self.layout
@@ -270,7 +270,7 @@ class DATA_PT_active_spline(CurveButtonsPanelActive, Panel):
 
 
 class DATA_PT_font(CurveButtonsPanel, Panel):
-    bl_label = _("Font")
+    bl_label = "Font"
 
     @classmethod
     def poll(cls, context):
@@ -334,7 +334,7 @@ class DATA_PT_font(CurveButtonsPanel, Panel):
 
 
 class DATA_PT_paragraph(CurveButtonsPanel, Panel):
-    bl_label = _("Paragraph")
+    bl_label = "Paragraph"
 
     @classmethod
     def poll(cls, context):
@@ -363,7 +363,7 @@ class DATA_PT_paragraph(CurveButtonsPanel, Panel):
 
 
 class DATA_PT_text_boxes(CurveButtonsPanel, Panel):
-    bl_label = _("Text Boxes")
+    bl_label = "Text Boxes"
 
     @classmethod
     def poll(cls, context):