Ignore a couple of standard files

Well, one's only standard for Virginia, but whatever.
Include stanza for v0.7
Update copyright years
Explain use of APC, mod_pagespeed, add Varnish
Increment version number in docblock

From v0.6 to v0.7.
No changes whatsoever

I have no idea why GitHub wants me to commit nonexistent changes. Not a
single line of any of these files displays in the program's diff, yet
here we are.
Generate structural statistics

Per #247.
Increase the size of the header

The default layout is jumbled without this space.
Remove clipboard functionality from permalinks

This is only until they're resolved in #327, as part of the UI release.
Offload plain text rendering to Law.inc.php

We actually already offloaded it; now we're removing the extra text
generation from law.php. Per #160 and #161.
Add a docblock
Correct a variable name

Was using the wrong variable name, breaking the whole method.
Respect the presence of port numbers in URLs
Replace wpautop with nl2br

`wpautop()` wraps even single-paragraph blocks of text in `<p>` tags,
which we do not want. So replace those paragraph tags with break tags
instead.
Improve code formatting
Provide a metadata column in the structure table

Per #247.
Clear out the structure table when clearing the database
Remove "repealed" records from laws_meta

Per #294.
Only save history data to laws_meta if it exists

Closes #296.
Rewrap comment