Merge for retab
Add Busybox CMD Stager
Port linksys_wrt110 to use the stager
Add unauthenticated check
Add a new SSH test module
Use busybox stager
Switch the cmd stager name
Change test module filename
Use Rex::Text
fix descriptions
Enable just linux targets
Merge pull request #6 from jvazquez-r7/cmdstager_echo_linux

Merge @jvazquez-r7's cmd_stager additions and linksys exploit fixes into branch