[elpa] externals/denote updated (c07185b002 -> a553003322)

[ELPA Syncer]

elpasync pushed a change to branch externals/denote.

      from  c07185b002 Use correct symbol in two private doc strings
       new  a93d9f2c60 Clarify denote-file-type doc string
       new  dec6367e64 Make denote-file-types read a :date-function
       new  4c7bfe26bc Make date format functions public
       new  9957eaa4a4 Clarify denote-link--format-markdown doc string
       new  a553003322 Make link format variables public


Summary of changes:
 README.org |  49 +++++++++++++++++++++++-----
 denote.el  | 107 +++++++++++++++++++++++++++++++++++++++++++++----------------
 2 files changed, 121 insertions(+), 35 deletions(-)