Strategy to copy artifacts minified and source artifact + bootstrap task

== dist folder
when developing dist folder contain source artifact
when kibana is ready for a release the dist grunt task can be run to
copy minified artifact in the dist folder if present.
this way, we dont have to change the url/src inside of html and javascript files.
One could have use grunt-usemin, but grunt-usemin would not parse javascript files thus, labjs could not point to the right artifact. It look like they use requirejs and have a way to set this up....

== bootstrap
bootstrap/dark.css and bootstrap/light.css files are copied to bower_component to be generated. the output goes to dist since it's a product of the bootstrap artifact

with bootstrap/dark the input text was gray on gray, so I added type=text in bootswatch to override that with white on gray. (arround line 423)

== relative url
switched some relative url to absolute url (load_big, js/*)

== remove sample nodejs server
connect is suitable for this