Revert "import doesn't work for bitbucket any more"

This reverts commit 2a21d0f - this just needs fixing (i.e. updating
to take into account their change of site layout, which it has to
scrape to get some information), raither than removing from the
documentation. See issue #143

docs/fdroid.texi

@@ -392,6 +392,8 @@ Some Google Code projects have multiple repositories, identified by a
 dropdown list on the @code{source/checkout} page. To access one other than
 the default, specify its name using the @code{--repo} switch.
 @item
+Bitbucket - @code{https://bitbucket.org/USER/PROJECT/}
+@item
 Git - @code{git://REPO}
 @end enumerate