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/modules/rna_prop_ui.py

@@ -19,7 +19,7 @@
 # <pep8 compliant>
 
 import bpy
-from blf import gettext as _
+
 
 def rna_idprop_ui_get(item, create=True):
     try:
@@ -145,7 +145,7 @@ def draw(layout, context, context_member, property_type, use_edit=True):
 
         if use_edit:
             row = split.row(align=True)
-            prop = row.operator("wm.properties_edit", text=_("edit"))
+            prop = row.operator("wm.properties_edit", text="edit")
             assign_props(prop, val_draw, key)
 
             prop = row.operator("wm.properties_remove", text="", icon='ZOOMOUT')
@@ -157,7 +157,7 @@ class PropertyPanel():
     The subclass should have its own poll function
     and the variable '_context_path' MUST be set.
     """
-    bl_label = _("Custom Properties")
+    bl_label = "Custom Properties"
     bl_options = {'DEFAULT_CLOSED'}
 
     @classmethod