fix bug, use strtotime instead of strftime in getVersion()
fix bug, use strtotime instead of strftime in getVersion()

- strftime() formats a timestamp given in the second argument, or
  defaults to now(), using the first argument as the format, so it
  returned latterly "5 minutes ago" (by comparison strftime("%Y")
  would yield 2012.

  This function call should've been strtotime() which converts the
  given (formatted) string into a unix timestamp, which we can then
  compare to the timestamp from filemtime(). Before the cache was
  never cleared because "some string" > timestamp.

  Also including the ref name in the $version string.
  $version = "1.0.0-alpha (master:e19508ff)";

newzly/testswarm,newzly/testswarm,newzly/testswarm,newzly/testswarm