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/space_dopesheet.py

@@ -140,7 +140,7 @@ class DOPESHEET_HT_header(Header):
 
 
 class DOPESHEET_MT_view(Menu):
-    bl_label = _("View")
+    bl_label = "View"
 
     def draw(self, context):
         layout = self.layout
@@ -174,7 +174,7 @@ class DOPESHEET_MT_view(Menu):
 
 
 class DOPESHEET_MT_select(Menu):
-    bl_label = _("Select")
+    bl_label = "Select"
 
     def draw(self, context):
         layout = self.layout
@@ -209,7 +209,7 @@ class DOPESHEET_MT_select(Menu):
 
 
 class DOPESHEET_MT_marker(Menu):
-    bl_label = _("Marker")
+    bl_label = "Marker"
 
     def draw(self, context):
         layout = self.layout
@@ -239,7 +239,7 @@ class DOPESHEET_MT_marker(Menu):
 # Keyframe Editing
 
 class DOPESHEET_MT_channel(Menu):
-    bl_label = _("Channel")
+    bl_label = "Channel"
 
     def draw(self, context):
         layout = self.layout
@@ -269,7 +269,7 @@ class DOPESHEET_MT_channel(Menu):
 
 
 class DOPESHEET_MT_key(Menu):
-    bl_label = _("Key")
+    bl_label = "Key"
 
     def draw(self, context):
         layout = self.layout
@@ -301,7 +301,7 @@ class DOPESHEET_MT_key(Menu):
 
 
 class DOPESHEET_MT_key_transform(Menu):
-    bl_label = _("Transform")
+    bl_label = "Transform"
 
     def draw(self, context):
         layout = self.layout
@@ -316,7 +316,7 @@ class DOPESHEET_MT_key_transform(Menu):
 # Grease Pencil Editing
 
 class DOPESHEET_MT_gpencil_channel(Menu):
-    bl_label = _("Channel")
+    bl_label = "Channel"
 
     def draw(self, context):
         layout = self.layout
@@ -343,7 +343,7 @@ class DOPESHEET_MT_gpencil_channel(Menu):
 
 
 class DOPESHEET_MT_gpencil_frame(Menu):
-    bl_label = _("Frame")
+    bl_label = "Frame"
 
     def draw(self, context):
         layout = self.layout