[nongnu] elpa/projectile updated (81a7e5d405 -> bff3421b06)

[ELPA Syncer]

elpasync pushed a change to branch elpa/projectile.

      from  81a7e5d405 Rename the cache file to .projectile-cache.eld
       new  01f69afe09 Tweak a docstring
       new  00ec14cada Add a couple of comments
       new  bff3421b06 [Docs] Update some setup instructions


Summary of changes:
 doc/modules/ROOT/pages/installation.adoc |  3 +--
 doc/modules/ROOT/pages/usage.adoc        | 14 +++++++++++++-
 projectile.el                            |  6 ++++--
 3 files changed, 18 insertions(+), 5 deletions(-)