Update p5-Continuit to 1.5.

Changes from previous:
Version 1.5 (released 2011.09.17)
  * Fix PSGI docroot
  * Documentation improvements

Version 1.4 (released 2011.03.20)
  * Make PSGI adapter be non-blocking
  * Also make it use the psgi.streaming interface
  * Add yield to Adapt::HttpDaemon's print (I thought it was there before?)
  * Add Coro thread descriptions for better debugging

Version 1.3 (released 2010.11.22)
  * Stupid version number issue

Version 1.2.0 (released 2010.11.22)
  * Refactor PSGI adaptor (scrottie)
  * Random documentation updates

(hiramatsu)