Make augtest set AUGEAS_ROOT and AUGEAS_SPECLIB before running augtool.
Make augtest set AUGEAS_ROOT and AUGEAS_SPECLIB before running augtool.

augtest now copies test files into a separate subdirectory and points
augtool to that as its root. It also points augtool to ../spec for the spec
files.

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