gitk: Add keybinding to switch to parent commit

Signed-off-by: Max Kirillov <max@max630.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
gitk: Updated Bulgarian translation (302t,0f,0u)

Signed-off-by: Alexander Shopov <ash@kambanaria.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Git 2.1-rc2

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'master' of git://ozlabs.org/~paulus/gitk

* 'master' of git://ozlabs.org/~paulus/gitk:
  gitk: Updated Bulgarian translation (302t,0f,0u)
  gitk: Add keybinding to switch to parent commit
t3904: fix cut-and-paste typo in test description
tests: make patch-mode test failure more verbose

Previously, a failing test of verify_state would simply exit
non-zero, causing the test to fail. This meant that it was
difficult to know which file had different contents, or what
the difference was. Instead, build it around test_cmp, which
generally shows a diff on failure.
stash apply -p WIP