Merge pull request #31 from zzottel/master

Bring back like and share buttons
Redbasic - implement "dark" colours.  Intended to make life easier for a theme developer.
Clean up fancy.css a bit
fix a typo and bring back nav:hover animation for the red scheme
add groups and personal configs to export/import
allow embedded content via ajax on page load
Redbasic - minor margin changes to prevent overlap with some configurations.
little fixes
Merge https://github.com/friendica/red into zpull
start formatting for Doxygen
doxygen gets tripped up by 'if (! function_exists' - but this construct no longer has value anyway.
partial port of embedded shares
make sure old fetch_url calls (and those that provided their own curl wrapper) go through z_fetch_url
route oembed through z_fetch_url
initial doco
small doco update
remove things calling feed_birthday(), so we can remove it
doc update
remove date on the footer
xss attack vector in bbcode.php - check for proc_open being disabled for security reasons in install