Handle missing legislators more intelligently

[waldoj]

When a bill is being inserted, and the legislator doesn't exist in the database, the method of handling it is really poor. It's just a SQL error. Make these improvements, in this priority order:

• Have the logged error message indicate that this is likely the problem.
• Create a function to retrieve barebones information about the legislator from the legislature's website, and insert a stub record about that legislator, prior to inserting the bill record. Basic house member data can be easily screen-scraped from the members list (they even generate CSV by screen-scraping their own site).
• Fetch images House images from e.g. https://memdata.virginiageneralassembly.gov/images/display_image/H0212
• Ensure that a high-level alert is generated about the stub record, so that I know to build it out (instead of letting a terrible legislator record languish on the site).
• Rebuild the site menu