* bootstrap: pull in isblank explicitly
* bootstrap: pull in isblank explicitly

Fixes bug #111

GeoffWilliams/augeas,kunkku/augeas,mlichvar/augeas,lutter/augeas,raphink/augeas,manandbytes/augeas,hercules-team/augeas-do-not-use,ptoscano/augeas,mchf/augeas,kumy/augeas,lutter/augeas,dafugg/augeas,lutter/augeas,raphink/augeas,jjlin/augeas,hercules-team/augeas-do-not-use,GeoffWilliams/augeas,MikaelSmith/augeas,jtopjian/augeas,kunkku/augeas,dafugg/augeas,domcleal/augeas,ptoscano/augeas,dafugg/augeas,mlichvar/augeas,jasperla/augeas,hercules-team/augeas,kumy/augeas,jtopjian/augeas,kumy/augeas,kunkku/augeas,domcleal/augeas,manandbytes/augeas,hercules-team/augeas-do-not-use,domcleal/augeas,jasperla/augeas,pevalme/augeas,ptoscano/augeas,mlichvar/augeas,mchf/augeas,MikaelSmith/augeas,jjlin/augeas,jjlin/augeas,pevalme/augeas,pevalme/augeas,kumy/augeas,hercules-team/augeas