Added example directory structure.
Merge branch 'example-structure'
Started some docs.

I am going to try for a document-driven design, here.
Changed the structure of the hosts file.
Updated docs.
Updated the README
Switched from golang/glog to standard log module
Removed all use of golang/glog.
Added an example playbook.
Commented out the intentionally-bad host group
playbook: Initial playbook implementation.
Load and check the plays in the playbook.
modules: Initial module code
modules: Initial brain dump.
Added a TODO file
Added a TODO file
modules/_include: Changed MARGS -> PARAMS
modules: Implemented the getparam function, and param parsing
modules/echo: Implemented the echo module.

It just simply echoes the value of the "message" parameter, or all of
the arguments if the "message" parameter was not specified.
modules: "Bulletproofed" the keyword param parsing