[elpa] externals/transient updated (2f12f06c68 -> a6c1b4f837)

[Jonas Bernoulli]

tarsius pushed a change to branch externals/transient.

      from  2f12f06c68 Backport commit 7705bdfa5b8 from Emacs
       new  3f103b6778 docs: Relegate the old introduction and introduce the 
term "menu"
       new  c5245b5c5c docs: Add new contributed introduction
       new  a6c1b4f837 Release version 0.5.1


Summary of changes:
 CHANGELOG           |   4 +-
 README.org          | 111 +++++++++--------
 docs/transient.org  | 328 ++++++++++++++++++++++++++------------------------
 docs/transient.texi | 341 +++++++++++++++++++++++++++-------------------------
 lisp/transient.el   |  26 +---
 5 files changed, 422 insertions(+), 388 deletions(-)