Chrome v23+ should open_latest() not open_v21()

Changed the `open` IF statement to A) check for `<` instead of `<=` v23.  
And B) use Math.floor() instead of parseInt(): [jsperf](http://jsperf.com/math-floor-vs-math-round-vs-parseint/55)
Merge pull request #121 from jcready/patch-1

Chrome v23+ should open_latest() not open_v21()
Version 0.7.3. Minor fixes and added a test
Added BAN and PURGE methods

These methods are often used in varnish cache to clear the cache for
single pages or the whole cache
Merge pull request #142 from tobiasge/master

Added BAN and PURGE method for varnish testing
Added paypal buttons
Changed wording
Updated Paypal button
Merged stuff
Merged with master
Removed permissions requirement
For v0.8.0.1 - Removed extra permission due to stupid Chrome behavior
Fixed multiple warnings
Added 'Format code' feature for RAW data editor.
Argh! no project, no!
Merge pull request #187 from GrzegorzKaczan/master

Added 'Format code' feature for RAW data editor.