Bump version to 2.5.0

Bump version to OSXFUSE SSHFS 2.4.1

The only difference between version 2.4.0 and 2.4.1 is the updated man page to
reflect Darwin/OS X specific changes to upstream SSHFS.

Bump version to OSXFUSE SSHFS 2.4.0

Apply modified sshfs 2.2 patch from MacFUSE

Based on Amit Singh's work at http://code.google.com/p/macfuse/