Doxygen include/attach.php

Some Doxygen as far as I understood and some styleguides.
IT: update to the strings
Merge pull request #323 from tuscanhobbit/master

IT: update to the strings
Merge branch 'master' of https://github.com/friendica/red
Merge pull request #321 from git-marijus/master

bootstrapify the nav
Merge pull request #322 from dawnbreak/master

Doxygen include/attach.php
s/View remote profiles as webpages/Do not view remote profiles in
frames/g
use a "fullscreen" icon for chanview full screen mode; add channel_menu selection and setting to the settings page.
Merge pull request #324 from tonybaldwin/master

Do not view remote profiles in frames. (changed description for display->settings), in ALL relevant files
Merge branch 'master' of https://github.com/friendica/red
fixes issue #326 initial scale to big