Add prompt prefix to set up env

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
add build_pelican_doc() to set up env

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Add build_js_doc() to set up env

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>
Add Bootstrap-based template for doc

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>