[STUMP] sample-stumpwmrc.lisp fix

[Замковий/Олексій]

Hi, when I've tried to use "google" and "imdb" commands from
sample-stumpwmrc.lisp file, I've found few
bugs - searching words divided by spaces gave us several tabs in
firefox and some symbols were not shell-escaped (using "!" or "$" in our query 
could brake query).
I've fixed this bug, patch is in attachment, my solution uses external library
for escaping urls.

0001-Improved-google-and-imdb-commands-from-sample-st.patch
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