translate the gtkdoc API document to local language

[wuxiaotian <wu2xiaotian gmail com>]

hello,I wrote a tools to find out the gtkdoc content from C source, then
create a pot file. so we can translate the pot file to different
language. at last, the tools can write the locale content to C source
according the po file. so we can i18n the gtkdoc API document easily.
I hope you like it.

download: http://gtk-doc-cn.googlecode.com/svn/trunk/tools/gtkdocpo

project: http://code.google.com/p/gtk-doc-cn