Small ES/CAT fixes

· Added translations for the new fields
· Fixed some spelling mistakes
· Changed where possible english to spanish links.

There is few info in spanish/catalan to change all links to es/cat sources, but when I have time I'll work on the Bitcoin/Peercoin spanish wiki and hopefully all links can be changed then
Projects page
Merge pull request #46 from boshevski/master

Projects page
New Peer4Commit Button
Added Project Page
Fixing Header Link
Merge pull request #25 from mrbickle/master

Small ES/CAT fixes