bbcode [Fit] tag

Collapses the EFT fit in a spoiler and links to Osmium. With a bit more
API support from Osmium this could be extended in some cool ways like
showing DPS/EHP/cost.
remove print. oops.
Esacpe fit tag contents in marrow, not bbcode

We need the raw text, otherwise we pass osmium things like
"&#39;Arbalest&#39; Heavy Missile Launcher".
Proper fit display inside [fit] tags
Ensure we don't slam osmium with repeated requests
Merge pull request #81 from eve-val/fit-tag

Fit tag