rnoaa v0.6.5

MINOR IMPROVEMENTS

• Added notes to docs of functions that do file caching - where
  to find cached files.
• meteo_clear_cache gains parameter force to control force
  parameter in unlink()
• Removed lubridate usage in seaiceurls() function, just using
  base R functions.

BUG FIXES

• Fixed bug which was affecting binary installs only. We accidentally
  determined a path on package build, such that the user
  of the CRAN binary build machine got inserted into the path.
  This is now fixed. (#173)