updated buildfiles
fixed rename bug #67
updated version and buildfiles
support rexfile for exec
support # in iplist text
update the regexp for ifconfig. be possible to match ppp0.
fix the bad pkg_info execution on freebsd.
set $? to match effective command return value

When run Locally, a command return value is left-shifted 8 times.
This behavior isn't noticed when the exact same command is run through SSH.

$ perldoc -f system

This is by design, but Rex needs to stay the same wherever we are running locally or remotely.
warn if task already exists.
fixed typo. fixed redhat/centos repository add bug #73
fixed mount persistent bug #75
removed kerberos options in --help
skip empty lines
updated contributors list
updated buildfiles
updated changelog
changed from DB_File to Storable
added a test for push
updated buildfiles
fixed a bug with profiling