[#44345937] Searchers see better recall on jobs searches

- Normalized things like "i.t." to be "it"
- Removed stopwords entirely, as job titles don't tend to have them, and anything in there that would normally be a stopword (e.g., 'it') is actually an abbreviation.
- Enabled synonyms for most common job-related synonyms
[#44345937] Searchers see better recall on jobs searches

- Added support for queries of form "{city} jobs" or "jobs {city}"