change expire header for text/html for better caching. fixes #22
Update readme.md

Fix typo.
Merge pull request #25 from georgRay/patch-1

Update readme.md
Added task to purge repository cache
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Added task to purge repository cache
  Update readme.md
  change expire header for text/html for better caching. fixes #22