Add jquery, bootstrap and datetimepicker

Signed-off-by: Heikki Salo <heikki.ao.salo@iki.fi>
Modify templates

Signed-off-by: Heikki Salo <heikki.ao.salo@iki.fi>
Add js function to build project tree object

Signed-off-by: Heikki Salo <heikki.ao.salo@iki.fi>
Ugly way to nest projects to option

Using temporarily HTML select with nested options.
This doesn't work well with Bootstrap. Better selector
is needed.

Signed-off-by: Heikki Salo <heikki.ao.salo@iki.fi>