WEB-5266 Highlighting selected node in taxonomy tree.
WEB-5266 removed text decoration from selected node link.
WEB-5267 Added 0 values for missing measurements.
Rename some class methods to be slightly clearer

...It's a bit redundant, but .begin implied that there's an end
somewhere, and there isn't, so this is less confusing (and more
typical).
Removed superfluous variable

...An instance variable that was only used in one place.
Spaces before curly braces.
Made private methods private
Refactored Classification#autocomplete

Created private helper class to clarify the nested loops.
Moved private class to it's own file

Various other tweaks after pairing with JR.
Merge branch 'autocomplete_search_simplification' of github.com:EOL/ggi into autocomplete_search_simplification