bin/adb-weixin-choose-chatter: make sure it is in the input window
bin/bbs-robot: fix it for a long article reading
bin/sawfish-get-screen-shot: copy the whole last line, instead of the first character only
bin/sawfish-search-for-screen: for debugging, save the screen-exchange files

Signed-off-by: Bao Haojun <baohaojun@gmail.com>