Ignore backup files when generating all-posts list, improve filtering logic
Ignore backup files when generating all-posts list, improve filtering logic

Ignore-this: 6d55985fa3b1e2698ed3af72c0d3f9ef

darcs-hash:20100731161145-e018d-fb2b54d232d387caea4b1a1d81ef78190b7faad9.gz

jtdaugherty/mathblog