HTML.Nofollow enabled

added nofollow rel attributes external links in snippet's description.
More detail packages specs http://htmlpurifier.org/live/configdoc/plain.html#HTML.Nofollow

Note: i don't test this, please check before merge.
Local installation document updated, removing outdated warning.
Updating URL to local installation document.
Moving hard coded strings and site specific content to configuration file.
Adding gulp for task automation. Removing redundant config.rb. Removing /sass folder in preparation for new design written in /scss.
Removing bootstrap, now including CDN version. Removing redundant files. Removing boot composer code, redundant.
Adding new helper library and macros.
Adding phase #1 of the new design.
Adding missing margin-bottom to .discuss container.
Fixing bug where profile icons were the wrong way around. Oops!
Changing mail hardcoded strings to use site config.
Fixing padding on sign up page.
Changing hard coded string to use config file stored value.
Fixing bug causing member snippets not to display.
Merge branch 'patch-1' of github.com:mayoz/laravelsnippets into mayoz-patch-1

Conflicts:
	app/views/snippets/show.blade.php
Fixing bug preventing sign ups.
Adding new logo.
Correcting button border styling issue.
Removing redundant Javascript/coffeescript files.
Upgrading Laravel to 4.1.26.