0.8 initial release

pathing, structure changes to move towards release

* pathing changed for attachable_text3d.scad -> openscad_attachable_text3d/attachable_text3d.scad (yes, it's a bit of a mouthful; no, I don't really mind)
* VERSION added, and set for versioning substition
* undesired packaged files marked for ignore
* pulled out the wiki generation workflow