textile -> docpad conversion of the three getting started files

Few things to look out for here.

h6 may not be supported in docpad; the subsections in part 3 don't seem to render their numbers (e.g., 2.3.1.2 ).

The # filename=a/b/c.js doesn't seem to be correct, or to be correctly styled.

There are button-like styles for filenames in part 3; they need to be styled in docpad.

NOTE requires a ':' and INFO doesn't. Bizarre.

Probably a few other things. This took a long time.