better Velocity parsing in SublimeText
use a dummy project url to avoid issues when normalising relative links. Fixes #13

The issue appeared when `project.url` was not set. This caused problems when parent links, e.g. ../dev/index.html were relativized against no proper root. The normalization is necessary for 'active' link calculations and nicer relative links in general.
no trailing space in links when icon/image is not available