Command to obtain version; Update installation instructions.
1.0.1
Use `pimdm` package to avoid collisions with other third-parties modules/classes.
1.0
First public release. PIM-DM implementation according to [RFC3973](https://tools.ietf.org/html/rfc3973) and IGMPv2 implementation according to [RFC2236](https://tools.ietf.org/html/rfc2236).