MComix SVN (old)

process: tweak find_executable

Add optional function argument 'is_valid_candidate': must return True if
the path passed in argument is a valid candidate (to check for version
number, symlinks to an unsupported variant, etc...).

Update Russian translation

win32: update fontconfig cache on startup

On Windows, update the fontconfig cache manually, before MComix starts
using Gtk, since the process may take several minutes, during which the
main window will just be frozen if the work is left to Gtk itself...

constants: remove gtk dependency

Move GDK/GTK dependent "constants" from the 'image_tools' module, so the
'constant' module can be included without triggering GDK/GTK imports.

image_tools: fix load_pixbuf_size bug

Let GDK/PIL calculate the correct image dimensions after resizing,
otherwise the 2 compounded calculations can result in a rounding error,
making one of the dimension of the resulting pixbuf one pixel smaller
than what we asked for.

This in turn can result in some of the library covers being always
regenerated because the resulting thumbnails size does not match what
was asked for.

It is 2016 already.

Make main window width default to 640 pixels.

500 is not wide enough for the toolbar, at least on Windows.

Change double buffering behavior of the thumbnailer.

Also adds a note.

Update Russian translation

archive: improve external rar support

- support encrypted contents/headers
- fix solid archive detection