Track page speed for all visitors.

The 1% default sample size is much too small given the number
of visitors I get.
Update settings files.
Turn off normalization except in production.
Update post_dir locations.
Fix missed normalization setting.
Update xkcd2 project page to new format.

Must have missed it in previous commits.
Add link to RSS feed in sidebar and clean up other links.
Use Feedburner for site feed.
Add search to the sidebar in anticipation of Engineer 0.4.0.
More changes in anticipation of Engineer 0.4.0.
More version 0.4.0 changes.
Add redirects for the old link style.
Test out new permalink style on www2.
.htaccess adjustment.
Update link style for production site.

Redirects in the .htaccess file should work.
Don't include dates in 'review' posts.
Update redirects to be more comprehensive.
Update settings files to be compatible with latest versions of Engineer.
Remove Twitter snippet from sidebar.
Remove bitbucket link from sidebar.