Variablizing $assets_url

This allows for implementation in subfolder contexts that may have a
different [[++assets_url]] setting. Also a custom assets_url could be
passed in through $scriptProperties
Merge branch 'defer-js' into assets-path-defer-js

Conflicts:
core/components/lexrating/elements/snippets/lexrating.snippet.php

Variablizes Assets Path and allows option to load JavaScript at bottom
of page
Allowing Connector Path to be Configurable

Also fixing a few more hardcoded assets/ paths
Ignoring build.config.php
Making resetable configurable
Fixing Assets Path in Chunks
Reverting moving getRating function to on doc ready
gitignore