added functions and incorporated review comments - compute_font_size, ua_default_for_property, node_presentational_hint, node_is_lang, node_is_target, node_is_checked, node_is_disabled, node_is_enabled, node_is_focus, node_is_active, node_is_hover, node_is_visited,node_is_link, node_is_empty, node_count_siblings, node_is_root, node_has_attribute_includes, node_has_attribute_equal, node_has_attribute, node_has_id, node_has_class, node_has_name, sibling_node, parent_node, named_generic_sibling_node, named_sibling_node, named_parent_node, named_ancestor_node - in select-auto.rs
Merge branch 'master' of https://github.com/webconvforge/sri-delhi-rust-libcss

Conflicts:
	test/libcss/select-auto.rs