Further conversions to Text in Docs modules

[hdgarrood]

No description provided.

[hdgarrood]

The majority of this was fairly obvious and mindless, I just changed the data declarations and then fixed all the compile errors. The only bits weren't were small bits in Language.PureScript.Publish where it calls other executables, and also bits of the Docs stuff which depend on other libraries that still use String, such as bower-json, so there are a still a few occurrences of T.pack and T.unpack dotted about. I plan to come back to this later but I think this is already a big improvement and didn't want to try to do too much in one go.

[paf31]

Looks great, thanks!