* devel-2.6:
  Make stable-2.6 compatible with newer pep8
  Fix computation of disk sizes in _ComputeDiskSize
  Add verification of RPC results in _WipeDisks
  Add test for checking that all gnt-* subcommands run OK
  Fix double use of PRIORITY_OPT in gnt-node migrate
  Add new Makefile target to rebuild the whole dist
  rapi client: accept arbitrary shutdown arguments
  Handle offline nodes for "instance down" checks
  Add missing rst files to Makefile.am
  Release version 2.6.0 (final)
  Fix 'explicitely' common typo
  Fix issue in LUClusterVerifyGroup with multi-group clusters
  Add QA test for node group modification of ndparams
  Fix node group modification of node parameters
  Fix RST formatting in NEWS file
  Update NEWS and bump version for release 2.5.2
  Fix boot=on flag for CDROMs
  KVM: only pass boot flag once
  Ensure a stable content of the bash completion file

Conflicts (all trivial):
        Makefile.am  (design drafts on both sides, pep8 changes)
        autotools/build-bash-completion (copyright years)

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>