Selection: Set context for precompiled leading-ID selectors

Closes gh-243
Build: Switch to specific dependencies versions
Core: Specify affected Firefox versions in a support comment.
Build: Use the es3 option in jsHint for src/*
Build: Upgrade QUnit to 1.14.0
Update version to 1.10.18
Update version to 1.10.19-pre
Compilation: Expose tokenize for much profit

Close gh-242