Store selectors and combinators inline in a single sequence.

This improves cache locality and reduces allocations during parsing.

Note that this reverses the iteration order within a sequence of simple selectors,
but that shouldn't matter.

components/selectors/lib.rs

@@ -9,6 +9,7 @@ extern crate fnv;
 extern crate precomputed_hash;
 extern crate smallvec;
 
+pub mod arcslice;
 pub mod bloom;
 pub mod matching;
 pub mod parser;