[elpa] externals/compat updated (688e2d983c -> ffb28c7442)

[ELPA Syncer]

elpasync pushed a change to branch externals/compat.

      from  688e2d983c Add missing links to tests
       new  6c7a7e6067 Improve manual
       new  3f2eed3c64 Update manual
       new  109e9edf99 Update readme
       new  e870789c5e Update readme
       new  ffb28c7442 Update readme


Summary of changes:
 README.md   |  66 ++++++++++++-------------
 compat.texi | 157 ++++++++++++++++++++++++++++++++++--------------------------
 2 files changed, 119 insertions(+), 104 deletions(-)