gitignore the `staging_path` generated when running the specs
rename the liquid tag `javascript_asset_tag` to `js_asset_tag`
add the original liquid tag `javascript_asset_tag` to preserve backward compatibility (`javascript_asset_tag` is an alias for `js_asset_tag`)
add the liquid tag `stylesheet_asset_tag` for enhanced code symmetry (`stylesheet_asset_tag` is an alias for `css_asset_tag`)
update readme to suggest using `js_asset_tag` instead of `javascript_asset_tag`
incorporate `#tag_full_name` in `LiquidBlockExtensions` module
update the version constant to "0.1.6", in order to match the latest version released on rubygems.org
update readme: document usage of yamls inline format for lists (i.e. arrays)
Loosen dependency on Jekyll to work with newly released version 1.0.0
bump version