Convert `@homepage` to `@homepageURL` in code.

* Applies to #13
Attempt translation changes based off of other \*URL key and set entitities to use `homepageURL`

Applies to #13
Merge pull request #14 from Martii/Issue-13Convert2homepageURL

Issue 13 convert2homepage url
#13, #14: use \@homepage when no \@homepageURL is assigned
fixed #12: resource names can be made up with all non-space chars, but should start with a word char