update version for 4.0pre4 build
update version for 4.0pre5dev development
Missing bind for two debug statements
Merge branch 'pingback' of git://github.com/ochameau/r2d2b2g into ochameau-pingback
Merge pull request #574 from bkase/bugfix-no-bind

Missing bind for two debug statements
fix review nits
pause briefly before trying to reconnect to reduce CPU load
Merge branch 'ochameau-pingback'
Stop injecting b2g.css twice. Do not inject b2g.css manually but keep using browser content stylesheet. Update b2g.css to match very last version.