bug @ v0.1 didn't work on prestashop 1.6.0.5

after the update the last days it didn't work anymore, because of the missing uri at the template
accepting full url and only name

now it doesn't matter any more if you type only the page in or if you're typing the full link in
Update blockfacebook.tpl
logic in php
Merge pull request #1 from f31n/patch-1

bug @ v0.1 didn't work on prestashop 1.6.0.5