Update tar

Added 'To create an uncompressed archive:' for no other reason than it was missing and was annoying me.
Create asterisk

Added a few of the more basic commands for interacting with Asterisk from the shell, at the moment this does not cover actually being inside the Asterisk CLI.
Update asterisk

Added what 'echo' does in originate command.
Merge pull request #16 from Simnol/master

Added 'asterisk' and minor update to 'tar'