Add app-text/lit-0.1.0.4.

Lit is a tool for literate programming. Instead of TeX, which is used by Knuth's WEB system, Markdown is used as the documentation markup language for lit.

Note: strange warnings occurred when I installed lit with this ebuild:
```
 * Registering no  ...
ghc-pkg: cannot find package no
: missing id field
: invalid package identifier:                                [ !! ]
 * Registering packages  ...
ghc-pkg: cannot find package packages
: missing id field
: invalid package identifier:                                [ !! ]
```