IDEA-116891 gradle import creates a lot of extra empty directories
(cherry picked from commit 9732da7)
IDEA-116881 Please time stamp gradle tasks
(cherry picked from commit 79c4e6e)
[log] IDEA-116399 Fix filter by branch

--branches parameter doesn't work well: the pattern syntax it
supports is rather weak, and won't allow to effectively filter by
several branches. It also doesn't support filtering by a single
branch without blog parameters.

Therefore, since we allow to filter only by a single branch in the
log UI, assume it in the GitLogProvider, and use the <branch>
parameter (`git log origin/master`), which works fine.

If we will provide ability to filter by several branches someday (by
AND or by OR), we could use the graph capabilities to implement it.
(cherry picked from commit 7e8b160)